Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.165in O/A Length, 0.3415in Stem

These Manley Race Series exhaust valves are built from high-quality stainless steel, specifically the XH-426 alloy for the exhaust side, giving you a solid foundation for your engine rebuild. They feature a 1.625-inch head diameter and a 5.165-inch overall length, with a 0.3415-inch stem diameter, making them a good fit for many Chevrolet Small Block applications. The chrome stems and hard tips are there to help them last longer and resist wear, especially important when you're pushing your engine hard.

You'll also notice the swirl polished under the head area and the fully machined combustion faces. This design work helps improve airflow into the cylinder and can contribute to more efficient combustion. Manley recommends these for alcohol engines, which tells you they're built to handle tough conditions. If you're rebuilding the top end of your Chevrolet Small Block and need reliable exhaust valves that can handle up to 8000 RPM, these are a well-built option to consider.