J.E. Pistons 370251 M8 Piston Kit - 0.050in. Oversize to 4.125in., 11.0:1 Compression

Bore: 4.125in.
Compression: 11.0:1 Compression
Sizing: 0.050in. Oversize

4.500 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 FLFBS Fat Boy 114
2018-2020 Harley Davidson FLHCS Heritage Classic 114
2019-2020 Harley Davidson FLHRXS Road King Special
2019-2020 Harley Davidson FLHTCUTG Tri Glide Ultra
2020-2022 Harley Davidson FLHTCUTGSE CVO Tri Glide
2019-2020 Harley Davidson FLHTK Ultra Limited
2019 Harley Davidson FLHTKL Ultra Limited Low
2018-2021 Harley Davidson FLHTKSE CVO Limited
2024 Harley Davidson FLHX Street Glide
2019-2020 Harley Davidson FLHXS Street Glide Special
2018-2022 Harley Davidson FLHXSE CVO Street Glide
2022-2023 Harley Davidson FLHXST Street Glide ST
2019-2020 Harley Davidson FLRT Freewheeler
2020 Harley Davidson FLTRK Road Glide Limited
2022-2023 Harley Davidson FLTRKSE CVO Road Glide Limited
2019 Harley Davidson FLTRU Road Glide Ultra
2024 Harley Davidson FLTRX Road Glide
2019-2020 Harley Davidson FLTRXS Road Glide Special
2018-2022 Harley Davidson FLTRXSE CVO Road Glide
2022-2023 Harley Davidson FLTRXST Road Glide ST
2023-2024 Harley Davidson FXBR Breakout 117
2018-2020 Harley Davidson FXBRS Breakout 114
2019-2020 Harley Davidson FXDRS FXDR 114
2018-2020 Harley Davidson FXFBS Fat Bob 114
2020 Harley Davidson FXLRS Low Rider S 114
2022-2024 Harley Davidson FXLRS Low Rider S 117
2022-2024 Harley Davidson FXLRST Low Rider ST 117
2022 Harley Davidson FXRST Low Rider El Diablo 117