Ferrea Honda H22A1/A4 31mm 5.48mm 107.1mm 22 Deg Flo +1mm 6000 Series Exhaust Valve - Set of 8

These Ferrea 6000 Series exhaust valves are made from a high-strength stainless steel alloy, specifically chosen for its ability to withstand the high temperatures and pressures found in performance Honda H22A1 and H22A4 engines. Each valve measures 31mm in diameter with a 5.48mm stem, and this set is designed to be 1mm oversized, measuring 107.1mm in overall length. This sizing is crucial for rebuilding or upgrading the top end of your engine, ensuring a proper seal and improved flow.

The 22-degree face angle on these valves is a design choice that helps promote better gas flow out of the combustion chamber, contributing to improved engine performance. Ferrea uses advanced heat treatment processes on their 6000 Series valves to increase their durability and resistance to wear, which is important for longevity, especially in modified engines. This set includes eight valves, enough for a complete cylinder head replacement on your H22 engine.