Manley Big Block Ford 429-460 1.880in Diameter 5.655in Length Race Master Exhaust Valves (Set of 8) - 11591-8

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 Ford 429-460 2.400in Diameter 5.725in Length Severe Duty Intake Valves (Set of 8) - 11590-8

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 Brodix Big Block SR20 Titanium Intake Valve 2.400in Head Dia 6.035 Length - 12210HTB-1

Titanium Valves for Weight Reduction: Ideal for reducing valve train weight, improving engine efficiency, and enhancing overall performance.High-RPM Capabilities: Tailored for high-rpm and extended high-rpm applications, allowing for higher engine speeds...

Manley Buick V6 1.5 Inch Head Diameter/.3415 Inch Stem Diameter/OE Height Exhaust Valves (Set of 6) - 11503-6

Manley Buick V6 1.5 Inch Head Diameter/.3415 Inch Stem Diameter/OE Height Exhaust Valves (Set of 6)

Manley Chevrolet 1.600 Dia Dish 5.026 O/A Length Severe Duty Exhaust Valves (Set of 8) - 11823-8

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 Chevrolet 1.840 Dia Dish 5.140 O/A Length Severe Duty Intake Valves (Set of 8) - 11820-8

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 Chevrolet 2.020 Dia Dish 5.026 O/A Length Severe Duty Intake Valves (Set of 8) - 11826-8

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 Chevrolet 2.020 Dia Dish 5.026 O/A Length Severe Duty Intake Valves (Set of 8) - 11882-8

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 Chevrolet Big Block 2.300 Head Dia .5.494in Stem Severe Duty Intake Valve - Single - 12854-1

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 Chevrolet Big Block 2.300 Head Dia .5.494in Stem Severe Duty Intake Valve Kit - Set of 8 - 12854-8

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 Chevrolet Big Block 2.300 Head, .3415 Stem, .350 Longer Severe Duty Valves (Set of 8) - 11878-8

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 Chevrolet Big Block Severe Duty/Pro Flo 5.325in O/A Length Intake Valves (Set of 8) - 11530-8

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...