The WISECO Piston Kit is designed for 4.125-inch bore, 117 CI, 107-inch M8 applications and features an 11:1 compression ratio for added power. ArmorX™ piston coating helps protect against extreme conditions and reduce wear, while the ArmorFit™ skirt coating auto-adjusts to the cylinder wall to support smooth, quiet, trouble-free operation without measuring clearance.
The dome design promotes improved flame travel to maximize air/fuel burn efficiency. A superfinish piston pin helps reduce friction and improve scuff resistance, while enhanced pin oiling supports improved lubrication. Augmented ring land details, dedicated rings, and precise fit contribute to improved ring seal, compression, and oil control. The kit includes two pistons, rings, piston pins, and circlips, and is made in the USA. It fits OEM and Screamin’ Eagle cylinder heads.
Distributor part number: 09031553. Manufacturer part number: K2799. Vehicle fitment includes the 2018 and 2020 Harley-Davidson FLHC Heritage Classic 107, 2017 Harley-Davidson FLHRXS Road King Special, 2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic, the 2018 and 2020 Harley-Davidson FLSL Softail Slim 107, 2019 Harley-Davidson FXLR Low Rider 107, 2022 Harley-Davidson FLHR Road King, 2018 Harley-Davidson FLHTCUTG Tri Glide Ultra, and 2019 Harley-Davidson FLHC Heritage Classic 107.
Features:
- ArmorX™ piston coating: Provides protection in extreme conditions and helps reduce wear.
- ArmorFit™ skirt coating: Auto-adjusts to the cylinder wall for smooth, quiet operation without measuring clearance.
- High compression: 11:1 compression ratio for added power.
- Dome design: Improves flame travel to maximize air/fuel burn efficiency.
- Superfinish piston pin: Reduces friction and improves scuff resistance.
- Enhanced pin oiling: Supports improved lubrication and reduced friction.
- Ring land and ring design: Augmented ring land details and dedicated rings support precise fit, improved compression, and oil control.
- Kit contents: Includes two pistons, rings, piston pins, and circlips.
- Cylinder head compatibility: Fits OEM and Screamin’ Eagle cylinder heads.
- Manufacturing: Made in the USA.
- Vehicle fitment: Fits the Harley-Davidson applications listed in the product description.
Fitment:
2017 Harley-Davidson FLHR Road King
2017 Harley-Davidson FLHRXS Road King Special
2017 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2017 Harley-Davidson FLHTCUTG Tri Glide Ultra
2017 Harley-Davidson FLHTK Ultra Limited
2017 Harley-Davidson FLHTKL Ultra Limited Low
2017 Harley-Davidson FLHX Street Glide
2017 Harley-Davidson FLHXS Street Glide Special
2017 Harley-Davidson FLRT Freewheeler
2017 Harley-Davidson FLTRU Road Glide Ultra
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 FLHRXS Road King Special
2018 Harley-Davidson FLHTCU Electra Glide Ultra Classic
2018 Harley-Davidson FLHTCUTG Tri Glide Ultra
2018 Harley-Davidson FLHTK Ultra Limited
2018 Harley-Davidson FLHTKL Ultra Limited Low
2018 Harley-Davidson FLHX Street Glide
2018 Harley-Davidson FLHXS Street Glide Special
2018 Harley-Davidson FLRT Freewheeler
2018 Harley-Davidson FLSB Sport Glide 107
2018 Harley-Davidson FLSL Softail Slim 107
2018 Harley-Davidson FLTRU Road Glide Ultra
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 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 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 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 FXST Softail Standard 107
2023 Harley-Davidson FLHX Street Glide
2023 Harley-Davidson FLSB Sport Glide 107
2023 Harley-Davidson FXST Softail Standard 107
2024 Harley-Davidson FLSB Sport Glide 107
2024 Harley-Davidson FXST Softail Standard 107