![JE Pistons Piston Kit - 4.255" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [399160]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/1280x1280/products/127327/137262/parts-09107018__04904.1787048865.jpg?c=2 "JE Pistons Piston Kit - 4.255\" Bore - 4.375\" Stroke - 12.0:1 CR - 107\" M8 [399160]")
![JE Pistons Piston Kit - 4.255" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [399160]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/127327/137262/parts-09107018__04904.1787048865.jpg?c=2 "JE Pistons Piston Kit - 4.255\" Bore - 4.375\" Stroke - 12.0:1 CR - 107\" M8 [399160]")
JE Pistons Piston Kit - 4.255" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [399160]
Manufacturer Part Number: 399160
Parts Unlimited Part Number: 09107018
Product Type: Piston & Ring Kits
Piston Kit - 4.255" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8
Details
- Compression Ratio: 12.0:1
- Stroke Length: 4.375"
- Units: Kit
- Riding Style: Street
- Bore Size: 4.255"
- Displacement: 107"
- Product Name: Piston Kit
- Piston Material: Forged 2618 Aluminum
- 2618-T6 forged construction provides better aligned grain flow and higher tensile strength to provide durability, even in high-performance builds
- Skirt coating reduces operating friction and wear
- Offset pins reduce piston rock and minimize operating noise
- Skirt notches for optimal clearance at bottom dead center
- Accumulator groove taps combustion gases below the top ring to promote more consistent, positive ring seal and performance
- Inlcudes two pistons, premium ring packs, wrist pins and wire locks
- Made in the USA
Verified Fitment
- 2019 Harley-Davidson FLHC Heritage Classic 107
- 2021 Harley-Davidson FLHC Heritage Classic 107
- 2018 Harley-Davidson FLHC Heritage Classic 107
- 2020 Harley-Davidson FLHC Heritage Classic 107
- 2019 Harley-Davidson FLHR Road King
- 2018 Harley-Davidson FLHR Road King
- 2021 Harley-Davidson FLHR Road King
- 2020 Harley-Davidson FLHR Road King
- 2017 Harley-Davidson FLHR Road King
- 2022 Harley-Davidson FLHR Road King
- 2019 Harley-Davidson FLHT Electra Glide Standard
- 2020 Harley-Davidson FLHT Electra Glide Standard
- 2021 Harley-Davidson FLHT Electra Glide Standard
- 2022 Harley-Davidson FLHT Electra Glide Standard
- 2018 Harley-Davidson FLHTK Ultra Limited
- 2020 Harley-Davidson FLHTK Ultra Limited
- 2017 Harley-Davidson FLHTK Ultra Limited
- 2019 Harley-Davidson FLHTK Ultra Limited
- 2020 Harley-Davidson FLHX Street Glide
- 2021 Harley-Davidson FLHX Street Glide
- 2018 Harley-Davidson FLHX Street Glide
- 2022 Harley-Davidson FLHX Street Glide
- 2023 Harley-Davidson FLHX Street Glide
- 2019 Harley-Davidson FLHX Street Glide
- 2017 Harley-Davidson FLHX Street Glide
- 2017 Harley-Davidson FLRT Freewheeler
- 2018 Harley-Davidson FLRT Freewheeler
- 2021 Harley-Davidson FLSB Sport Glide 107
- 2020 Harley-Davidson FLSB Sport Glide 107
- 2018 Harley-Davidson FLSB Sport Glide 107
- 2019 Harley-Davidson FLSB Sport Glide 107
- 2022 Harley-Davidson FLSB Sport Glide 107
- 2024 Harley-Davidson FLSB Sport Glide 107
- 2023 Harley-Davidson FLSB Sport Glide 107
- 2019 Harley-Davidson FLTRX Road Glide
- 2021 Harley-Davidson FLTRX Road Glide
- 2018 Harley-Davidson FLTRX Road Glide
- 2020 Harley-Davidson FLTRX Road Glide
- 2017 Harley-Davidson FLTRX Road Glide
- 2022 Harley-Davidson FLTRX Road Glide
- 2023 Harley-Davidson FLTRX Road Glide
- 2019 Harley-Davidson FLFB Fat Boy 107
- 2018 Harley-Davidson FLFB Fat Boy 107
- 2020 Harley-Davidson FLFB Fat Boy 107
- 2018 Harley-Davidson FLHTCU Electra Glide Ultra Classic
- 2019 Harley-Davidson FLHTCU Electra Glide Ultra Classic
- 2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic
- 2019 Harley-Davidson FXBR Breakout 107
- 2018 Harley-Davidson FXBR Breakout 107
- 2018 Harley-Davidson FLHTKL Ultra Limited Low
- 2017 Harley-Davidson FLHTKL Ultra Limited Low
- 2019 Harley-Davidson FLHTKL Ultra Limited Low
- 2021 Harley-Davidson FLSL Softail Slim 107
- 2018 Harley-Davidson FLSL Softail Slim 107
- 2020 Harley-Davidson FLSL Softail Slim 107
- 2019 Harley-Davidson FLSL Softail Slim 107
- 2019 Harley-Davidson FXBB Street Bob 107
- 2018 Harley-Davidson FXBB Street Bob 107
- 2020 Harley-Davidson FXBB Street Bob 107
- 2018 Harley-Davidson FXFB Fat Bob 107
- 2020 Harley-Davidson FXFB Fat Bob 107
- 2019 Harley-Davidson FXFB Fat Bob 107
- 2018 Harley-Davidson FXLR Low Rider 107
- 2020 Harley-Davidson FXLR Low Rider 107
- 2019 Harley-Davidson FXLR Low Rider 107
- 2020 Harley-Davidson FXST Softail Standard 107
- 2024 Harley-Davidson FXST Softail Standard 107
- 2021 Harley-Davidson FXST Softail Standard 107
- 2022 Harley-Davidson FXST Softail Standard 107
- 2023 Harley-Davidson FXST Softail Standard 107
- 2019 Harley-Davidson FLTRU Road Glide Ultra
- 2017 Harley-Davidson FLTRU Road Glide Ultra
- 2018 Harley-Davidson FLTRU Road Glide Ultra
- 2018 Harley-Davidson FLDE Deluxe 107
- 2020 Harley-Davidson FLDE Deluxe 107
- 2019 Harley-Davidson FLDE Deluxe 107
- 2017 Harley-Davidson FLHTCUTG Tri Glide Ultra
- 2018 Harley-Davidson FLHTCUTG Tri Glide Ultra
Yes
![JE Pistons Piston Kit - 4.255" Bore - 4.375" Stroke - 11.5:1 CR - 107" M8 [399155]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/127322/137257/parts-09107013__74394.1787048855.jpg?c=2 "JE Pistons Piston Kit - 4.255\" Bore - 4.375\" Stroke - 11.5:1 CR - 107\" M8 [399155]")
![JE Pistons Piston Kit - 4.260" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [399161]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/127328/137264/parts-09107019__36771.1787048865.jpg?c=2 "JE Pistons Piston Kit - 4.260\" Bore - 4.375\" Stroke - 12.0:1 CR - 107\" M8 [399161]")
![JE Pistons Piston Kit - 4.080" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [398755]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/127309/137244/parts-09107000__80126.1787048824.jpg?c=2 "JE Pistons Piston Kit - 4.080\" Bore - 4.375\" Stroke - 12.0:1 CR - 107\" M8 [398755]")
![JE Pistons Piston Kit - 4.125" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [398756]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/127310/137245/parts-09107001__50292.1787048830.jpg?c=2 "JE Pistons Piston Kit - 4.125\" Bore - 4.375\" Stroke - 12.0:1 CR - 107\" M8 [398756]")
![JE Pistons Piston Kit - 4.250" Bore - 4.375" Stroke - 12.0:1 CR - 107" M8 [398757]](https://cdn11.bigcommerce.com/s-2wrnp2lk/images/stencil/500x659/products/127311/137246/parts-09107002__67336.1787048831.jpg?c=2 "JE Pistons Piston Kit - 4.250\" Bore - 4.375\" Stroke - 12.0:1 CR - 107\" M8 [398757]")