Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. Steel Double Springs with .650in. Lift - Kibblewhite

Since 1939, KPMI® has taken great pride in our ability to design innovative performance improvements for valvetrains. This innovative ability has never been more apparent than with the development of the high-tech lightweight racing valve spring kits for the incredibly stressed and torturous environment in today’s V-Twin engines.

Note: Maximum Recommended Lift =.650″

Installed Height: 1.860″

Seat Pressure: 185#

Open Pressure: 440#

Tech Tips:-

Rocker box clearance must be checked

Spring travel must be checked

Valve timing must be accurate

Over revving will lead to pre-mature failure of Valve Springs & collars.