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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11881-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3415in Stem - 12743-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3715in Stem - 11509-8

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.454in O/A Length, 0.3715in Stem - 11731-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.464in O/A Length, 0.3715in Stem - 11525-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3110in Stem - 12815-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 10761-8

MSRP: $188.43

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11815-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11845-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 12737-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3715in Stem - 11515-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.364in O/A Length, 0.3715in Stem - 11593-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3110in Stem - 12817-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 10883-8

MSRP: $188.43

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11745-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11765-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11883-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 12745-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.454in O/A Length, 0.3715in Stem - 11733-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.464in O/A Length, 0.3715in Stem - 11535-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3110in Stem - 12811-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 10769-8

MSRP: $188.43

Now: $141.32

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11739-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11769-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11775-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11811-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11847-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3715in Stem - 11723-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 6.380in O/A Length, 0.3415in Stem - 11581-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 6.450in O/A Length, 0.3415in Stem - 11597-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.364in O/A Length, 0.3715in Stem - 11561-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3110in Stem - 12803-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11773-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11803-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem - 12773-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3715in Stem - 11849-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.454in O/A Length, 0.3715in Stem - 11735-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.464in O/A Length, 0.3715in Stem - 11533-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3110in Stem - 12809-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11741-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11777-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11809-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 12741-8

MSRP: $652.80

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3715in Stem - 11893-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 6.400in O/A Length, 0.3415in Stem - 11583-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11811B-8

MSRP: $382.30

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.218in O/A Length, 0.3715in Stem - 10714-8

MSRP: $188.43

Now: $141.32

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.218in O/A Length, 0.3720in Stem - 11836-8

MSRP:

Now: $386.04

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.325in O/A Length, 0.3720in Stem - 11554-8

MSRP: $395.52

Now: $296.64

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.190in Head Dia. 5.218in O/A Length, 0.3720in Stem - 11832-8

MSRP:

Now: $386.04

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.190in Head Dia. 5.244in O/A Length, 0.3415in Stem - 10872-8

MSRP: $188.43

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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.190in Head Dia. 5.244in O/A Length, 0.3715in Stem - 11718-8

MSRP: $239.60

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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11881-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3415in Stem - 12743-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.422in O/A Length, 0.3715in Stem - 11509-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.454in O/A Length, 0.3715in Stem - 11731-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.464in O/A Length, 0.3715in Stem - 11525-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3110in Stem - 12815-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 10761-8

High-Quality Stainless Steel: Our Street Series valves, available as XH-424 for exhaust and NK-841 for intake, are crafted from top-grade stainless steel, ensuring durability and longevity.Chrome Stems and Hard Tips: These valves feature chrome stems and...

MSRP: $188.43

Now: $141.32
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11815-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11845-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3415in Stem - 12737-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3715in Stem - 11515-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.364in O/A Length, 0.3715in Stem - 11593-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3110in Stem - 12817-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 10883-8

High-Quality Stainless Steel: Our Street Series valves, available as XH-424 for exhaust and NK-841 for intake, are crafted from top-grade stainless steel, ensuring durability and longevity.Chrome Stems and Hard Tips: These valves feature chrome stems and...

MSRP: $188.43

Now: $141.32
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11745-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11765-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11883-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem - 12745-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.454in O/A Length, 0.3715in Stem - 11733-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.464in O/A Length, 0.3715in Stem - 11535-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3110in Stem - 12811-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 10769-8

High-Quality Stainless Steel: Our Street Series valves, available as XH-424 for exhaust and NK-841 for intake, are crafted from top-grade stainless steel, ensuring durability and longevity.Chrome Stems and Hard Tips: These valves feature chrome stems and...

MSRP: $188.43

Now: $141.32
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11739-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11769-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11775-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11811-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11847-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3715in Stem - 11723-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 6.380in O/A Length, 0.3415in Stem - 11581-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 6.450in O/A Length, 0.3415in Stem - 11597-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.364in O/A Length, 0.3715in Stem - 11561-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3110in Stem - 12803-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11773-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem - 11803-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3415in Stem - 12773-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.422in O/A Length, 0.3715in Stem - 11849-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.454in O/A Length, 0.3715in Stem - 11735-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.464in O/A Length, 0.3715in Stem - 11533-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3110in Stem - 12809-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11741-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11777-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11809-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3415in Stem - 12741-8

Ideal for Specialized Applications: Tailored for any application where extreme force and heat resistance is a must including Top Fuel, Funny Car, and Marine Engine applications.XH-432 XtremeAlloy: The hallmark of excellence in exhaust valve material...

MSRP: $652.80

Now: $489.59
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 5.522in O/A Length, 0.3715in Stem - 11893-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Exhaust Valve Kit - 1.940in Head Dia. 6.400in O/A Length, 0.3415in Stem - 11583-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 1.900in Head Dia. 5.522in O/A Length, 0.3415in Stem - 11811B-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $382.30

Now: $286.72
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.218in O/A Length, 0.3715in Stem - 10714-8

High-Quality Stainless Steel: Our Street Series valves, available as XH-424 for exhaust and NK-841 for intake, are crafted from top-grade stainless steel, ensuring durability and longevity.Chrome Stems and Hard Tips: These valves feature chrome stems and...

MSRP: $188.43

Now: $141.32
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.218in O/A Length, 0.3720in Stem - 11836-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP:

Now: $386.04
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.325in O/A Length, 0.3720in Stem - 11554-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP: $395.52

Now: $296.64
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.190in Head Dia. 5.218in O/A Length, 0.3720in Stem - 11832-8

Proven Fatigue Tests: The Severe Duty? Valves have undergone rigorous fatigue tests. In normal operation, valves experience 20,000 to 25,000 lbs of applied stress. When valves bounce on the seat, this stress soars to 40,000 to 60,000 lbs. Manley exhaust...

MSRP:

Now: $386.04
CURRENTLY OUT OF STOCK Compare
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Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.190in Head Dia. 5.244in O/A Length, 0.3415in Stem - 10872-8

High-Quality Stainless Steel: Our Street Series valves, available as XH-424 for exhaust and NK-841 for intake, are crafted from top-grade stainless steel, ensuring durability and longevity.Chrome Stems and Hard Tips: These valves feature chrome stems and...

MSRP: $188.43

Now: $141.32
CURRENTLY OUT OF STOCK Compare
Quick view

Manley Performance

Manley Chevrolet Big Block Intake Valve Kit - 2.190in Head Dia. 5.244in O/A Length, 0.3715in Stem - 11718-8

Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity...

MSRP: $239.60

Now: $179.69
CURRENTLY OUT OF STOCK Compare

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