Premium quality spring steel wound in USA by PAC. Made with advanced heat treatment processing and surface finishing techniques (nano peening) to extend fatigue life.
Valve springs designed with a high spring frequency for superior spring surge control at high RPM.

Titanium retainers FEA designed and machined in-house on our new Doosan turning centres.

KVS99, Harley V-Rod, Beehive spring and Titanium Retainer Kit.
95lbs at 38.7mm installed height. 215lbs at 13mm lift. Coil bind at 24.4mm. Max valve lift 13mm.
Use the OEM spring base.