Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.240in O/A Length, 0.3110in Stem

These Manley Race Series exhaust valves are built for Chevrolet small block engines, especially those seeing serious use like bracket, drag, or oval track racing, and operating under 8000 RPM. They feature a 1.625-inch head diameter and a 5.240-inch overall length, with a 0.3110-inch stem diameter. The stainless steel construction means they're well-built to handle the heat and stress of performance engines.

You'll find these valves have chrome-plated stems and hard tips, which adds to their wear resistance and helps them last longer in demanding conditions. The underhead area is swirl polished to help smooth out airflow, and the combustion face is fully machined. This attention to detail helps optimize how efficiently your engine breathes and burns fuel. Manley also recommends these specific exhaust valves for use in alcohol-fueled engines, where they've proven to be a reliable choice.