Manley Chevrolet Big Block Exhaust Valve Kit - 1.880in Head Dia. 5.522in O/A Length, 0.3110in Stem

If you're rebuilding the top end of a Chevrolet big block engine, these exhaust valves from Manley Performance are a solid option. They're specifically designed for high-temperature gasoline applications, meaning they can handle the heat and stress that comes with performance builds. The valves feature a 1.880-inch head diameter and a 5.522-inch overall length, with a 0.3110-inch stem diameter, making them suitable for many big block Chevy cylinder heads.

Manley uses their XH-428 material for these exhaust valves, which is known for its exceptional strength at high temperatures. In fact, testing shows this material can endure up to 100 million cycles at 40,000 psi and 1400?F, which is significantly more than many competing valves. They also feature chrome stems and hard tips for added durability, and the under-head areas are swirl-polished to help improve airflow into the combustion chamber.

These valves are a good choice when you need reliable performance from your engine's exhaust system, especially in demanding conditions. They are built to last and handle the rigors of performance driving.