Action Clutch Stage 1 Clutch Kit (99-00 Civic Si) Wiseco and high-performance applications requiring dependable

and high-performance applications requiring dependable sealing integrity

and steel nitride/Napier XX ring technology for superior heat management and wear resistance

5mm Viton valve stem seals deliver OEM-equivalent performance for Honda intake applications

Built with quality materials and tight tolerances

Ideal for rebuilds

Action Clutch Stage 1 Clutch Kit (99-00 Civic Si) Wiseco and high-performance applications requiring dependableAction Clutch's lightweight flywheel engineered to deliver measurable performance gains through reduced rotational mass. The aluminum construction cuts weight enabling faster engine response, quicker acceleration, and improved throttle modulation. This upgrade minimizes drivetrain inertia for sharper shifts and enhanced rev matching capability. Ideal for drivers seeking responsive handling without sacrificing reliability or drivability in daily