Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.221in O/A Length, 0.3415in Stem

If you're rebuilding the top end of your Chevrolet small block engine, especially for performance or racing applications, new exhaust valves are a critical part of the job. These Manley Severe Duty? exhaust valves are made from XH-428 material, which is known for its strength at high temperatures. This material is chosen because exhaust valves endure significant stress and heat during operation, and having a well-built valve ensures reliable performance.

Manley has put these valves through some serious testing. They've shown they can handle up to 100 million cycles under demanding conditions, which is a lot more than many other valves can manage. The design includes a swirl-polished area under the head and a fully machined face to help improve airflow into the cylinder. Plus, they feature chrome stems and hard tips, which add to their durability and help them last longer in the engine.

This kit includes exhaust valves with a 1.625-inch head diameter, a 5.221-inch overall length, and a 0.3415-inch stem diameter, designed to fit specific Chevrolet small block applications. When rebuilding an engine, using strong, well-tested components like these can make a notable difference in the longevity and performance of your build.