Manley Chevrolet Small Block Exhaust Valve Kit - 1.600in Head Dia. 5.640in O/A Length, 0.3110in Stem

Starting with a 1.600-inch head diameter and a 5.640-inch overall length, these Manley Race Series exhaust valves are built for serious performance in Chevrolet Small Block engines. They are specifically designed for racing applications, including bracket, drag, and oval track use, handling engine speeds up to 8000 RPM. The stainless steel construction means they can stand up to the heat and stress of competition.

You'll find these valves feature chrome stems and hard tips, which adds to their lifespan and resistance to wear. The under-head areas are swirl polished, and the combustion faces are fully machined. This attention to detail helps improve airflow into the cylinder and makes for more efficient combustion. Manley also offers these in different shapes, like the Race Master straight stem or the Race Flo, so you can match them to your engine's specific needs. They're also a recommended choice for exhaust valves in alcohol-fueled engines, showing their capability in demanding environments.

If you're rebuilding the top end of your Chevrolet Small Block for racing, these valves are a solid option. Make sure to check the specific shape that best suits your cylinder head porting and combustion chamber design.