Manley Big Block Chevrolet 1.900 Diameter Stock Length Extreme Duty Exhaust Valve (Single Valve) - 11507-1

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...

Manley Big Block Chevrolet 1.900 Diameter Stock Length Extreme Duty Exhaust Valves - Set of 8 - 11507-8

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...

Manley Big Block Chevrolet Extreme Duty Exh. Valve 1.88in. Head Dia / .3415in. Stem Dia - Set of 8 - 11743-8

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...

Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single - 12739-1

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...

Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter Set of 8 - 12739-8

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...

Manley Big Block Chevrolet Extreme Duty Intake Valve 2.3in. Head Dia / .3415in. Stem Dia - Set of 8 - 11784-8

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...

Manley Big Block Chevrolet Int. 2.190 Head Dia. 5.218 O/A Length .3715 Stem Race Flo Valve (Single) - 11528-1

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...

Manley Big Block Chevrolet Int. 2.190 Head Dia. 5.218 O/A Length .3715 Stem Race Flo Valve Set of 8 - 11528-8

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...

Manley Big Block Chevrolet Street Flo 1.880 Head Dia Exhaust Valves - 10727-8

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...

Manley Big Block Chevrolet Street Flo 2.190 Head Dia Intake Valves - 10728-8

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...

Manley Big Block Chevy 1.880 Dia (+.100 L) Race Master Intake Valves (Set of 8) - 11719-8

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...

Manley Big Block Chevy 1.880 Dia Race Master Intake Valves (Set of 8) - 11717-8

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...