Supertech Valve Spring & Retainer Kit for Honda D-Series Supertech:Default Title Action Clutch's lightweight flywheel engineered

Action Clutch's lightweight flywheel engineered to deliver measurable performance gains through reduced rotational mass

These mounts provide exceptional rigidity while maintaining optimal engine positioning

and the finest tolerances guaranteeing exact fitment

engine rebuilds

Supertech Valve Spring & Retainer Kit for Honda D-Series Supertech:Default Title Action Clutch's lightweight flywheel engineeredEngineered for high revving D Series engines, this Supertech valve spring and retainer kit delivers the precision valve control needed for aggressive cam profiles and elevated RPM applications. Premium materials and tight tolerances ensure consistent performance and durability under extreme conditions. Direct bolt on fitment eliminates guesswork, making it an essential upgrade for serious Honda tuners pushing their engines to the limit.