Top End

Precision-machined from C630Compatible with no-lead fuel and accept any type of valve-stem materialProvide maximum service with chromed valve stemsFeature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow...

Extensive R&D on all applications to provide high-performance components that last longer than OEMSuper-clean silicon wire used in valve springs is ground, not shaved, and X-rayed at regular intervals to check for flawsKeepers not included; use OEM...

Piston Kit - 4.320" - M8 394140

Piston Kit - 4.310" - M8 394139

Piston Kit - 4.250" - M8 394138

Piston Kit - 4.310" - M8 394100

Je Pistons Piston Kit - 14.5:1 - Kawasaki 391920 Kawasaki -- KX 250 -- (2023)

Piston Kit - 4.250" - M8 391731

Piston Kit - 4.320" - M8 391730

Je Pistons Piston Kit - 13.5:1 - Kawasaki 379938 Kawasaki -- KX 450 -- (2023, 2021, 2022)

Je Pistons Piston Kit - 12.5:1 - Kawasaki 379937 Kawasaki -- KX 450 -- (2021, 2023, 2022)

Je Pistons Piston Kit 379457 Polaris -- RZR XP Turbo EPS 4x4 -- (2019, 2018, 2016, 2020, 2021, 2017)