The WISECO Piston Kit is designed with a 4.075-inch bore for 117 CI and 114/117 M8 applications. It features ArmorX™ piston coating for protection in extreme conditions and reduced wear, while the ArmorFit™ skirt coating auto-adjusts to the cylinder wall to support smooth, quiet operation without the need to measure clearance. The dome design improves flame travel to maximize air and fuel burn efficiency, and the 11:1 compression ratio is designed to provide added power.
This kit includes two pistons, rings, piston pins and circlips. Superfinish piston pins help reduce friction and improve scuff resistance. Enhanced pin oiling supports improved lubrication, while augmented ring land details and dedicated rings promote precise fit, improved compression and oil control. The pistons fit OEM and Screamin’ Eagle cylinder heads and are made in the USA. Distributor part number: K2804. Manufacturer part number: K2804.
Vehicle fitment includes the 2019 Harley-Davidson FLHCS Heritage Classic 114, 2023 Harley-Davidson FLFBS Fat Boy 114, 2019 Harley-Davidson FLTRXS Road Glide Special, 2023 Harley-Davidson FLTRXST Road Glide ST, 2023 Harley-Davidson FXBR Breakout 117, 2018 and 2020 Harley-Davidson FXFBS Fat Bob 114, 2020 Harley-Davidson FXBRS Breakout 114, 2019 Harley-Davidson FXDRS FXDR 114 and 2018 Harley-Davidson FLHR Road King.
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.
- Dome design: Improves flame travel to maximize air and fuel burn efficiency.
- High compression: 11:1 compression ratio is designed for added power.
- Superfinish piston pins: Help reduce friction and improve scuff resistance.
- Enhanced pin oiling: Supports improved lubrication and reduced friction.
- Ring land design: Augmented details improve ring seal and function.
- Dedicated rings: Provide precise fit with 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 FLHTK Ultra Limited
2017 Harley-Davidson FLHXS Street Glide Special
2017 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FLFBS Fat Boy 114
2018 Harley-Davidson FLHCS Heritage Classic 114
2018 Harley-Davidson FLHR Road King
2018 Harley-Davidson FLHTK Ultra Limited
2018 Harley-Davidson FLHXS Street Glide Special
2018 Harley-Davidson FLTRXS Road Glide Special
2018 Harley-Davidson FXBRS Breakout 114
2018 Harley-Davidson FXFBS Fat Bob 114
2019 Harley-Davidson FLFBS Fat Boy 114
2019 Harley-Davidson FLHCS Heritage Classic 114
2019 Harley-Davidson FLHR Road King
2019 Harley-Davidson FLHT Electra Glide Standard
2019 Harley-Davidson FLHTK Ultra Limited
2019 Harley-Davidson FLHXS Street Glide Special
2019 Harley-Davidson FLTRXS Road Glide Special
2019 Harley-Davidson FXBRS Breakout 114
2019 Harley-Davidson FXDRS FXDR 114
2019 Harley-Davidson FXFBS Fat Bob 114
2020 Harley-Davidson FLFBS Fat Boy 114
2020 Harley-Davidson FLHCS Heritage Classic 114
2020 Harley-Davidson FLHR Road King
2020 Harley-Davidson FLHT Electra Glide Standard
2020 Harley-Davidson FLHTK Ultra Limited
2020 Harley-Davidson FLHXS Street Glide Special
2020 Harley-Davidson FLTRXS Road Glide Special
2020 Harley-Davidson FXBRS Breakout 114
2020 Harley-Davidson FXDRS FXDR 114
2020 Harley-Davidson FXFBS Fat Bob 114
2020 Harley-Davidson FXLRS Low Rider S 114
2021 Harley-Davidson FLFBS Fat Boy 114
2021 Harley-Davidson FLHCS Heritage Classic 114
2021 Harley-Davidson FLHR Road King
2021 Harley-Davidson FLHT Electra Glide Standard
2021 Harley-Davidson FLHTK Ultra Limited
2021 Harley-Davidson FLHXS Street Glide Special
2021 Harley-Davidson FLTRXS Road Glide Special
2021 Harley-Davidson FXBBS Street Bob 114
2021 Harley-Davidson FXFBS Fat Bob 114
2021 Harley-Davidson FXLRS Low Rider S 114
2022 Harley-Davidson FLFBS Fat Boy 114
2022 Harley-Davidson FLHCS Heritage Classic 114
2022 Harley-Davidson FLHR Road King
2022 Harley-Davidson FLHT Electra Glide Standard
2022 Harley-Davidson FLHTK Ultra Limited
2022 Harley-Davidson FLHXS Street Glide Special
2022 Harley-Davidson FLHXST Street Glide ST
2022 Harley-Davidson FLTRXS Road Glide Special
2022 Harley-Davidson FLTRXST Road Glide ST
2022 Harley-Davidson FXBBS Street Bob 114
2022 Harley-Davidson FXFBS Fat Bob 114
2022 Harley-Davidson FXLRS Low Rider S 117
2022 Harley-Davidson FXLRST Low Rider ST 117
2022 Harley-Davidson FXRST Low Rider El Diablo 117
2023 Harley-Davidson FLFBS Fat Boy 114
2023 Harley-Davidson FLHCS Heritage Classic 114
2023 Harley-Davidson FLHTK Ultra Limited
2023 Harley-Davidson FLHXS Street Glide Special
2023 Harley-Davidson FLHXST Street Glide ST
2023 Harley-Davidson FLTRXS Road Glide Special
2023 Harley-Davidson FLTRXST Road Glide ST
2023 Harley-Davidson FXBBS Street Bob 114
2023 Harley-Davidson FXBR Breakout 117
2023 Harley-Davidson FXFBS Fat Bob 114
2023 Harley-Davidson FXLRS Low Rider S 117
2023 Harley-Davidson FXLRST Low Rider ST 117
2024 Harley-Davidson FLFBS Fat Boy 114
2024 Harley-Davidson FLHCS Heritage Classic 114
2024 Harley-Davidson FLHTK Ultra Limited
2024 Harley-Davidson FXBBS Street Bob 114
2024 Harley-Davidson FXBR Breakout 117
2024 Harley-Davidson FXLRS Low Rider S 117
2024 Harley-Davidson FXLRST Low Rider ST 117
2025 Harley-Davidson FXBR Breakout 117
2025 Harley-Davidson FXLRS Low Rider S 117
2025 Harley-Davidson FXLRST Low Rider ST 117