Manley Chevrolet Big Block Exhaust Valve Kit - 1.900in Head Dia. 5.422in O/A Length, 0.3415in Stem

Starting with a 1.900-inch head diameter and a 5.422-inch overall length, these Manley Race Series exhaust valves are built for serious performance in Chevrolet big block engines. They are designed for applications running up to 8000 RPM, making them a solid choice for bracket, drag, and oval track racing. The stainless steel construction ensures they can handle the heat and stress of high-performance use.

You'll find these valves feature chrome stems and hard tips, which add to their wear resistance and overall lifespan. The under-head areas are swirl polished, and the combustion faces are fully machined. This attention to detail helps optimize airflow into the cylinder and can contribute to better combustion efficiency. Manley also offers these in different shapes, like the Race Master straight stem and Race Flo, so you can match them to your engine's specific needs.

These are also the recommended exhaust valves if you're running an alcohol-based fuel. They are well-made and designed to perform reliably even under those demanding conditions.