J.E. Pistons 370245 M8 Piston Kit - 0.188in. Oversize to 4.125in., 11.0:1 Compression

Bore: 4.125in.
Compression: 11.0:1 Compression
Sizing: 0.188in. Oversize

4.375 Stroke

From Daytona to Bonneville, JE Pistons continues to set the standards in piston design. JE has recorded wins at Daytona, low ETs on the drag strip and land speed records at Bonneville. Machined from 2618-T6 high-tensile forged aluminum. Dome/ dish features smooth flowing radii; require no deburring or preparation. JE designs are specifically engineered for extreme applications including professional competition. Kit includes pistons, rings, piston pins and circlips. Made in the U.S.A.

Vehicle Fitment:

2018-2020 Harley Davidson FLDE Deluxe 107
2018-2019 Harley Davidson FLFB Fat Boy 107
2018-2020 Harley Davidson FLHC Heritage Classic 107
2017-2020 Harley Davidson FLHR Road King
2017-2018 Harley Davidson FLHRXS Road King Special
2019-2020 Harley Davidson FLHT Electra Glide Standard
2017-2019 Harley Davidson FLHTCU Electra Glide Ultra Classic
2017-2018 Harley Davidson FLHTCUTG Tri Glide Ultra
2017-2018 Harley Davidson FLHTK Ultra Limited
2017-2018 Harley Davidson FLHTKL Ultra Limited Low
2017-2020 Harley Davidson FLHX Street Glide
2017-2018 Harley Davidson FLHXS Street Glide Special
2017-2018 Harley Davidson FLRT Freewheeler
2018-2020 Harley Davidson FLSB Sport Glide 107
2018-2020 Harley Davidson FLSL Softail Slim 107
2017-2018 Harley Davidson FLTRU Road Glide Ultra
2017-2020 Harley Davidson FLTRX Road Glide
2017-2018 Harley Davidson FLTRXS Road Glide Special
2018-2020 Harley Davidson FXBB Street Bob 107
2018-2019 Harley Davidson FXBR Breakout 107
2018-2019 Harley Davidson FXFB Fat Bob 107
2018-2020 Harley Davidson FXLR Low Rider 107
2020 Harley Davidson FXST Softail Standard 107