S&S Cycle 90-1504 Super Stock EVO Cylinder Heads - Black engine-pistons-piston-rings 2007-2014 Yamaha YFM350 Grizzly 4x4

2007-2014 Yamaha YFM350 Grizzly 4x4 Auto

engines are boosted to 100in

Multi-layer reinforced knee construction and grip texture for good on-bike contact

The most extensive line of kits for off-road applications

1988-1990 Harley Davidson FXSTS Springer Softail

S&S Cycle 90-1504 Super Stock EVO Cylinder Heads - Black engine-pistons-piston-rings 2007-2014 Yamaha YFM350 Grizzly 4x4S&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