S&S Cycle 90-1504 Super Stock EVO Cylinder Heads - Black engine-pistons-piston-rings 1988-1990 Harley Davidson FXSTS Springer

1988-1990 Harley Davidson FXSTS Springer Softail

2011-2014 Gas Gas EC 300E

The most extensive line of kits for off-road applications

465 Torque Cam kits are the ideal choice for Touring bike applications

S&S Cycle 90-1504 Super Stock EVO Cylinder Heads - Black engine-pistons-piston-rings 1988-1990 Harley Davidson FXSTS SpringerS&S heads give great performance now, and work perfectly with additional upgrades later. Kits are fully assembled, and include stainless steel valves and high lift springs (up to . 640 lift). Available in natural and black powder coat finish. Intake manifold, pistons and gasket kits are sold separately; gasket kits contain head gaskets, base gaskets and exhaust pipe gaskets (rocker box gaskets are not included due to the variety of available rocker