Cylinder Kit - 139" - Black with Highlighted Fins - 107" M8
Features
- Aerospace-grade all-aluminum cylinder with nickel-silicon-carbide (NSC) electroplated bore
- NSC-plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan
- Includes pair of all-aluminum NSC-coated bore cylinders, custom-forged pistons with high-tension rings specifically designed for NSC cylinders and a head/base gasket set
- Made in the USA
- Will require case boring, which is not recommended on OEM cases '95 and earlier; some kits will require a 4.625" stroke crank as noted.
Specs
| Cylinder Bore Coating | Nickel-Silicon Carbide |
| Riding Style | Street |
| Type | Monster Big Bore |
| Units | Kit |
| Bore Size | 4.500" |
| Compression Ratio | 11.2:1 |
| Features | Flat Top |
| Color/Finish | Highlighted Fins |
| Material | Aluminum |
| Product Name | Cylinder Kit |
| Stroke Length | 4.375" |
| Displacement | 139" |
| Year | Make | Model |
|---|---|---|
| 2017 | Harley-Davidson | Electra Glide Police FLHTPI |
| 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 |
| 2017 | Harley-Davidson | FLTRX Road Glide |
| 2017 | Harley-Davidson | FLTRXS Road Glide Special |
| 2017 | Harley-Davidson | Road King Police FLHP |
| 2018 | Harley-Davidson | Electra Glide Police FLHTPI |
| 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 | FLTRX Road Glide |
| 2018 | Harley-Davidson | FLTRXS Road Glide Special |
| 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 |
| 2018 | Harley-Davidson | Road King Police FLHP |
| 2019 | Harley-Davidson | Electra Glide Police FLHTPI |
| 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 | FLHRXS Road King Special |
| 2019 | Harley-Davidson | FLHT Electra Glide Standard |
| 2019 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic |
| 2019 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2019 | Harley-Davidson | FLHTK Ultra Limited |
| 2019 | Harley-Davidson | FLHTKL Ultra Limited Low |
| 2019 | Harley-Davidson | FLHX Street Glide |
| 2019 | Harley-Davidson | FLHXS Street Glide Special |
| 2019 | Harley-Davidson | FLRT Freewheeler |
| 2019 | Harley-Davidson | FLSB Sport Glide 107 |
| 2019 | Harley-Davidson | FLSL Softail Slim 107 |
| 2019 | Harley-Davidson | FLTRU Road Glide Ultra |
| 2019 | Harley-Davidson | FLTRX Road Glide |
| 2019 | Harley-Davidson | FLTRXS Road Glide Special |
| 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 |
| 2019 | Harley-Davidson | Road King Police FLHP |
| 2020 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2020 | Harley-Davidson | FLDE Deluxe 107 |
| 2020 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2020 | Harley-Davidson | FLHR Road King |
| 2020 | Harley-Davidson | FLHRXS Road King Special |
| 2020 | Harley-Davidson | FLHT Electra Glide Standard |
| 2020 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2020 | Harley-Davidson | FLHTK Ultra Limited |
| 2020 | Harley-Davidson | FLHX Street Glide |
| 2020 | Harley-Davidson | FLHXS Street Glide Special |
| 2020 | Harley-Davidson | FLRT Freewheeler |
| 2020 | Harley-Davidson | FLSB Sport Glide 107 |
| 2020 | Harley-Davidson | FLSL Softail Slim 107 |
| 2020 | Harley-Davidson | FLTRK Road Glide Limited |
| 2020 | Harley-Davidson | FLTRX Road Glide |
| 2020 | Harley-Davidson | FLTRXS Road Glide Special |
| 2020 | Harley-Davidson | FXBB Street Bob 107 |
| 2020 | Harley-Davidson | FXLR Low Rider 107 |
| 2020 | Harley-Davidson | FXST Softail Standard 107 |
| 2020 | Harley-Davidson | Road King Police FLHP |
| 2021 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2021 | Harley-Davidson | FLHC Heritage Classic 107 |
| 2021 | Harley-Davidson | FLHR Road King |
| 2021 | Harley-Davidson | FLHRXS Road King Special |
| 2021 | Harley-Davidson | FLHT Electra Glide Standard |
| 2021 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2021 | Harley-Davidson | FLHTK Ultra Limited |
| 2021 | Harley-Davidson | FLHX Street Glide |
| 2021 | Harley-Davidson | FLHXS Street Glide Special |
| 2021 | Harley-Davidson | FLRT Freewheeler |
| 2021 | Harley-Davidson | FLSB Sport Glide 107 |
| 2021 | Harley-Davidson | FLSL Softail Slim 107 |
| 2021 | Harley-Davidson | FLTRK Road Glide Limited |
| 2021 | Harley-Davidson | FLTRX Road Glide |
| 2021 | Harley-Davidson | FLTRXS Road Glide Special |
| 2021 | Harley-Davidson | FXBBS Street Bob 114 |
| 2021 | Harley-Davidson | FXST Softail Standard 107 |
| 2021 | Harley-Davidson | Road King Police FLHP |
| 2022 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2022 | Harley-Davidson | FLHR Road King |
| 2022 | Harley-Davidson | FLHRXS Road King Special |
| 2022 | Harley-Davidson | FLHT Electra Glide Standard |
| 2022 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2022 | Harley-Davidson | FLHTK Ultra Limited |
| 2022 | Harley-Davidson | FLHX Street Glide |
| 2022 | Harley-Davidson | FLHXS Street Glide Special |
| 2022 | Harley-Davidson | FLRT Freewheeler |
| 2022 | Harley-Davidson | FLTRK Road Glide Limited |
| 2022 | Harley-Davidson | FLTRX Road Glide |
| 2022 | Harley-Davidson | FLTRXS Road Glide Special |
| 2022 | Harley-Davidson | FLTRXST Road Glide ST |
| 2022 | Harley-Davidson | FXST Softail Standard 107 |
| 2022 | Harley-Davidson | Road King Police FLHP |
| 2022 | Harley-Davidson | Softail Street Bob FXBB |
| 2023 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2023 | Harley-Davidson | FLHRXS Road King Special |
| 2023 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2023 | Harley-Davidson | FLHTK Ultra Limited |
| 2023 | Harley-Davidson | FLHX Street Glide |
| 2023 | Harley-Davidson | FLHXS Street Glide Special |
| 2023 | Harley-Davidson | FLRT Freewheeler |
| 2023 | Harley-Davidson | FLTRK Road Glide Limited |
| 2023 | Harley-Davidson | FLTRX Road Glide |
| 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 | FXST Softail Standard 107 |
| 2023 | Harley-Davidson | Road King Police FLHP |
| 2024 | Harley-Davidson | Electra Glide Police FLHTPI |
| 2024 | Harley-Davidson | FLHRXS Road King Special |
| 2024 | Harley-Davidson | FLHTCUTG Tri Glide Ultra |
| 2024 | Harley-Davidson | FLHTK Ultra Limited |
| 2024 | Harley-Davidson | FLHX Street Glide |
| 2024 | Harley-Davidson | FLRT Freewheeler |
| 2024 | Harley-Davidson | FLTRK Road Glide Limited |
| 2024 | Harley-Davidson | FLTRX Road Glide |
| 2024 | Harley-Davidson | FXBBS Street Bob 114 |
| 2024 | Harley-Davidson | FXBR Breakout 117 |
| 2024 | Harley-Davidson | FXST Softail Standard 107 |
| 2024 | Harley-Davidson | Road Glide Police FLTRXP |
| 2024 | Harley-Davidson | Road King Police FLHP |
Fitment details provided by supplier.
Product Videos
Custom Field
Type Monster Big Bore
Color/Finish Highlighted Fins
Material Aluminum
