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In Stock Manley Chevy Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves (set Of 8) Series [1LKu5i2F]

$57.99 $185.99 -69%

Manley Chevy Big Block Intake ValvesIntroducing the Manley Chevy Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves, a set of 8 designed to elevate the performance of your high-temperature gasoline engine. These valves are engineered wi

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Manley Chevy Big Block Intake Valves

Introducing the Manley Chevy Big Block .250 Longer 11/32in Stem Dia Severe Duty Intake Valves, a set of 8 designed to elevate the performance of your high-temperature gasoline engine. These valves are engineered with cutting-edge technology to provide unmatched durability and longevity. With their robust design and superior materials, they are perfect for those seeking top-tier performance and reliability.

Superior Materials and Performance

These intake valves are crafted from the highest-quality materials, ensuring superior performance and longevity. The chrome stems and hard tips enhance durability and resistance to wear and tear. The valves are swirl polished under head areas and fully machined combustion faces, optimizing combustion and airflow efficiency. The XH-428 material used for exhaust valves offers nearly double the ultimate tensile strength at 1500°F compared to competitors, while the NK-844 material for intake valves boasts over four times the ultimate tensile strength at 1000°F. This means your engine will experience unparalleled performance and endurance.

Proven Durability and Reliability

Manley's Severe Duty intake valves have undergone rigorous fatigue tests, demonstrating their exceptional durability. With the ability to endure up to 100,000,000 cycles at 40,000 psi and 1400°F, these valves outperform competitors by a staggering 1000 times. This ensures that your engine will maintain peak performance, even under the most demanding conditions. Whether you're on the track or the highway, these valves are designed to deliver consistent, reliable performance, making them an ideal choice for both professional racers and everyday drivers.

What Our Customers Say

January 11, 2026

Absolutely no complaints!

A really great item. I'm extremely, so very, so happy.

- Efnisien O..

January 11, 2026

Absolutely no complaints!

The quality is consistently top-tier.

- Ebenezer F..

January 11, 2026

Absolutely no complaints!

This is a very good and a very, very, very clever tool.

- Afallach P..

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