Wossner Piston Yamaha YFM450 Grizzly 07-11 BRAND_No-Toil and most importantly now includes

and most importantly now includes a 58psi regulator which Polaris implemented in 2013 to cure the well-known vapour lock problem

Sealed for life

Available individually in left-hand and right-hand thread or sold in pairs one L/H and one R/H thread

4x4 (MPAK2)

Viscosity 100°C: 7mm²/s

Wossner Piston Yamaha YFM450 Grizzly 07-11 BRAND_No-Toil and most importantly now includesWossner is Germany's finest aftermarket forged piston and rod manufacturer and have over 25 years of experience in the high performance racing industry. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service. Features In house designed and manufactured; all forgings are produced in Wossner's company owned forging operation 4 stroke pistons are made using a double bridged forging design