Blox Racing valves are stock-size but high compression;Specially designed to increase intake and exhaust airflow through the cylinder head;All valves are swirl polished, feature undercut stems and hardened tips;All valves are treated with black nitride, which provides a more durable and smoother surface compared to chrome coatings;Increases compression by approximately 0.3 points

• Blox Racing BXPT-20251 High Compression Exhaust Valve Set for Honda D-Series SOHC VTEC Engine

Blox Racing BXPT-20251 High Compression Exhaust Valve Set for Honda D-Series SOHC VTEC EngineBlox Racing