PISTON SYSTEM CRF450X

Top-End Service Kit

The only safe way to maximize compression; the valve reliefs in the piston are purposely convex and match the geometry of the dishes in the valves

Conversion to Black Diamond™ stainless steel valves offers up to twice the life of the stock titanium valves

No loss in performance

Made in the USA

Pistons, rings, valves and pin clips in this kit are designed to work as a system, they are NOT COMPATIBLE with the OEM components and should ONLY be used as a kit.

Intake: • Max Valve Lift 0.440" • Installed Height 1.215" • Seat Pressure 40 lb • Open Pressure 147 lb • @ Lift 0.440" Exhaust: • Max Valve Lift 0.440" • Installed Height 1.365" • Seat Pressure 70 lb • Open Pressure 203 lb • @ Lift 0.440" Includes: • 2x Intake Titanium Retainers • 2x Intake CrSi Valve Springs • 2x Intake H.T. Steel Basewashers • 2x Exhaust Titanium Retainers • 2x Exhaust CrSi Valve Springs • 2x Exhaust H.T. Steel Basewashers • 2x Intake Black Diamond™ Valves • 2x Exhaust Black Diamond­™ Valves • 1x High Performance Piston Kit • 1x Top End Gasket Kit