Manley Chevrolet Small Block Exhaust Valve Kit - 1.600in Head Dia. 4.950in O/A Length, 0.3136in Stem

These Manley Race Series exhaust valves are built for serious performance, especially if you're working with a Chevrolet Small Block engine that sees a lot of action, like in bracket, drag, or oval track racing, and stays under 8000 RPM. The head diameter is 1.600 inches, with an overall length of 4.950 inches, and a 0.3136-inch stem diameter. They're a solid choice for alcohol-fueled engines too, where reliability is key.

You're getting well-built stainless steel construction for both the exhaust and intake valves, which means they're going to hold up to the heat and stress. The stems are chromed and have hard tips, adding to their wear resistance and overall lifespan. Manley also swirl polishes the under-head areas and fully machines the combustion faces. This attention to detail helps optimize airflow into the cylinder and can improve combustion efficiency, making your engine run a little smoother and stronger.

You can choose between the Race Master (straight stem) and Race Flo shapes, depending on what your specific engine build needs. These are designed to be a direct replacement for your existing valves, assuming your engine is set up for these dimensions.