Valve Springs and Kits

The KPM high performance dual valve springs were specially designed for MPS by Kibblewhite Performance Machining.  Designed for all popular cam profiles, these springs were computer simulated with extra attention paid to mass, rpm, harmonics, and stress evaluations to provide the best valve spring for your Hayabusa.  They produce 65 pounds of seat pressure at 1.450” installed height and will not coil bind with cams up to .490 lift. KPM Hayabusa Valve Springs are made with premium grade super clean chrome silicon wire and are heat treated, shot peened, and stress relieved. 

World famous APE valve springs are made from premium chrome silicone wire for consistant pressure and excellent fatigue life. Racers as well as street riders have come to depend on APE springs for winning performance. For use with any high lift cam and / or agressive camshaft profile.