High lift high pressure spring kit. Reduces total valve train mass. Great for high performance & racing performance builds. The dual springs are manufactured from the highest quality clean chrome silicone wire; shot peened and heat treated for maximum fatigue life. Kit includes dual springs with internal damper to give a wider range of harmonic reduction; upper collars; lower collars; valve keys and seals. Max valve lift: .655″. Installed height: 1.810″. Seat pressure 185 lbs. Open pressure: 450 lbs. @ .655″ valve lift.
KPMI, valve spring kit. .655″ lift. Steel top collars
€313.70
84-99 Evo Big Twin; 99-04 Twin Cam; 86-03 XL Sportster (NU)