Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. Beehive Springs with .660in. Lift MS-AS47005 * Fits Chief Classic

* Fits Chief Classic

Aggressive

* Oil pickup tube routed to the rear of the oil pan for extended high acceleration & wheelies

overheating

040" Head Gasket

Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. Beehive Springs with .660in. Lift MS-AS47005 * Fits Chief ClassicBy taking advantage of the latest development in valve spring wire chemistry and manufacturing techniques, KPMI has developed ovate wire Beehive style springs that will live and perform at a high level in Harley Davidson applications. By coupling these developments with strict KPMI design protocols and employing multiple design, simulation, and FEA analysis software, we were we able to overcome the torsional stresses unique to ovate wire springs that