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

If you're rebuilding the top end of your Chevrolet big block engine, especially for racing applications under 8000 RPM, these Manley Race Series exhaust valves are a solid option. They're built to handle the stress of bracket, drag, and oval track racing, ensuring your engine breathes right when it matters most.

These valves are made from high-quality stainless steel, which is a strong choice for durability. The stems are chrome-plated and have hard tips, adding to their wear resistance and making them last longer. Manley also swirl polishes the areas under the head and fully machines the combustion faces. This attention to detail helps improve airflow into the cylinder and can contribute to better combustion efficiency. They're even recommended for alcohol-fueled engines, showing they can handle tough conditions.

You have a choice between Race Master (straight stem) and Race Flo shapes, so you can pick the one that best fits your engine's specific needs. Make sure to check the exact dimensions to confirm they're the right fit for your cylinder heads.