Large diameter valves are essential for improved air flow.
Cosworth high performance intake valves are produced from high
quality stainless steel for maximum durability. Exhaust valves are
machined from Inconel for high temperature (2400° F)
reliability. Each valve features a swirl polished back for improved
air flow and dished face for additional weight reduction. Some
Cosworth High Performance Valves are only compatible with Cosworth
Ultra Race Valve Spring Kits. Please confirm application before