Manley Chevy Big Block Stock 3/8 inch Severe Duty Intake Valves (Set of 8) - 11562-8

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 Chevy Big Block Street Flo Intake Valves 2.250in Head Dia - 10726-8

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 Chevy L83 5.3L 1.560in Head Diameter Pro Flo/Extreme Duty Exhaust Valves (Set of 8) - 12363-8

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 Chevy L83 5.3L 1.560in Head Diameter Pro Flo/Severe Duty Exhaust Valve (Set of 8) - 12361-8

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 Chevy L83 5.3L 1.560in Head Diameter Pro Flo/Severe Duty Exhaust Valve (Single) - 12361-1

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 Chevy L83 5.3L 1.930in Head Diameter Pro Flo/Severe Duty Intake Valve (Single) - 12358-1

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 Chevy L83 5.3L 1.930in Head Diameter Pro Flo/Severe Duty Intake Valves (Set of 8) - 12358-8

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 Chevy LS 8mm Stem Race Series Custom Stainless Exhaust Valves Blank (Set of 8) - 11269-8

Manley Chevy LS 8mm Stem Race Series Custom Stainless Exhaust Valves Blank (Set of 8)

Manley Chevy LS 8mm Stem Severe Duty Custom Stainless Exhaust Valves Blank (Set of 8) - 11279-8

Manley Chevy LS 8mm Stem Severe Duty Custom Stainless Exhaust Valves Blank (Set of 8)

Manley Chevy LS 8mm Stem Severe Duty Custom Stainless Intake Valves Blank (Set of 8) - 11274-8

Manley Chevy LS 8mm Stem Severe Duty Custom Stainless Intake Valves Blank (Set of 8)

Manley Chevy LS-1 Small Block 2.055 Pro Flo Severe Duty Exhaust Valves (Set of 8) - 11680-8

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 Chevy LS-1, LS-2 Small Block 1.550 Pro Flo Severe Duty Exhaust Valves (Set of 8) - 11673-8

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...