The WOSSNER Piston Kit is designed for applications using a 4.375-inch stroke and 107 CID M8 configuration. The piston crown features an anodized treatment intended to improve resistance to extreme heat, with testing showing improved thermal diffusivity by up to 10%. Hardcoat anodizing enhances the piston's ability to manage heat and wear while improving ring groove wear resistance during sliding contact compared with untreated surfaces.
This kit includes the piston, piston rings, piston pin and retaining clips. Valve pocket specifications include a 1.780-inch intake diameter, 0.200-inch intake depth and 27-degree intake angle, along with a 1.780-inch exhaust diameter, 0.200-inch exhaust depth and 27-degree exhaust angle. Distributor part number: 09106681. Manufacturer part number: K4081DA-2.
Fitment includes the 2018 and 2020 Harley-Davidson FLHC Heritage Classic 107, 2022 Harley-Davidson FLHR Road King, 2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic, 2018 and 2020 Harley-Davidson FLSL Softail Slim 107, 2017 Harley-Davidson FLTRX Road Glide, 2019 Harley-Davidson FXLR Low Rider 107, and the 2018 and 2022 Harley-Davidson FLHX Street Glide.
Features:
- Anodized Crown: Improves resistance to extreme heat.
- Thermal Diffusivity: Tested and proven to improve thermal diffusivity by up to 10%.
- Hardcoat Anodize Treatment: Enhances the piston's ability to manage heat and wear.
- Ring Groove Wear: Improves resistance to sliding wear compared with untreated surfaces.
- Kit Contents: Includes piston, piston rings, piston pin and retaining clips.
- Valve Pockets: Features 1.780-inch intake and exhaust diameters, 0.200-inch intake and exhaust depths, and 27-degree intake and exhaust angles.
- Fitment: Fits select Harley-Davidson 107 applications listed in the product description.
Fitment:
2017 Harley-Davidson FLHR Road King
2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2017 Harley-Davidson FLHX Street Glide
2017 Harley-Davidson FLRT Freewheeler
2017 Harley-Davidson FLTRX Road Glide
2018 Harley-Davidson FLDE Deluxe 107
2018 Harley-Davidson FLFB Fat Boy 107
2018 Harley-Davidson FLHC Heritage Classic 107
2018 Harley-Davidson FLHR Road King
2018 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2018 Harley-Davidson FLHX Street Glide
2018 Harley-Davidson FLRT Freewheeler
2018 Harley-Davidson FLSB Sport Glide 107
2018 Harley-Davidson FLSL Softail Slim 107
2018 Harley-Davidson FLTRX Road Glide
2018 Harley-Davidson FXBB Street Bob 107
2018 Harley-Davidson FXBR Breakout 107
2018 Harley-Davidson FXFB Fat Bob 107
2018 Harley-Davidson FXLR Low Rider 107
2019 Harley-Davidson FLDE Deluxe 107
2019 Harley-Davidson FLFB Fat Boy 107
2019 Harley-Davidson FLHC Heritage Classic 107
2019 Harley-Davidson FLHR Road King
2019 Harley-Davidson FLHT Electra Glide Standard
2019 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2019 Harley-Davidson FLHX Street Glide
2019 Harley-Davidson FLSB Sport Glide 107
2019 Harley-Davidson FLSL Softail Slim 107
2019 Harley-Davidson FLTRX Road Glide
2019 Harley-Davidson FXBB Street Bob 107
2019 Harley-Davidson FXBR Breakout 107
2019 Harley-Davidson FXFB Fat Bob 107
2019 Harley-Davidson FXLR Low Rider 107
2020 Harley-Davidson FLDE Deluxe 107
2020 Harley-Davidson FLFB Fat Boy 107
2020 Harley-Davidson FLHC Heritage Classic 107
2020 Harley-Davidson FLHR Road King
2020 Harley-Davidson FLHT Electra Glide Standard
2020 Harley-Davidson FLHX Street Glide
2020 Harley-Davidson FLSB Sport Glide 107
2020 Harley-Davidson FLSL Softail Slim 107
2020 Harley-Davidson FLTRX Road Glide
2020 Harley-Davidson FXBB Street Bob 107
2020 Harley-Davidson FXFB Fat Bob 107
2020 Harley-Davidson FXLR Low Rider 107
2020 Harley-Davidson FXST Softail Standard 107
2021 Harley-Davidson FLHC Heritage Classic 107
2021 Harley-Davidson FLHR Road King
2021 Harley-Davidson FLHT Electra Glide Standard
2021 Harley-Davidson FLHX Street Glide
2021 Harley-Davidson FLSB Sport Glide 107
2021 Harley-Davidson FLSL Softail Slim 107
2021 Harley-Davidson FLTRX Road Glide
2021 Harley-Davidson FXST Softail Standard 107
2022 Harley-Davidson FLHR Road King
2022 Harley-Davidson FLHT Electra Glide Standard
2022 Harley-Davidson FLHX Street Glide
2022 Harley-Davidson FLSB Sport Glide 107
2022 Harley-Davidson FLTRX Road Glide
2022 Harley-Davidson FXST Softail Standard 107
2023 Harley-Davidson FLHX Street Glide
2023 Harley-Davidson FLSB Sport Glide 107
2023 Harley-Davidson FLTRX Road Glide
2023 Harley-Davidson FXST Softail Standard 107
2024 Harley-Davidson FLSB Sport Glide 107
2024 Harley-Davidson FXST Softail Standard 107