- Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during mid-season
- Kits include a top-of-the line MLSS head gasket and two or more premium-quality base gaskets of different thicknesses to optimize engine compression ratios
- Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression
- Kits do not include valve stem seals, rubber parts, shims, or other fiber gaskets
Yamaha -- YZ 450 F -- (2014, 2016, 2015, 2017); Yamaha -- YZ 450 FX -- (2017, 2016, 2018); Yamaha -- WR 450 F -- (2016, 2017, 2018)