Twin Power 17-Up M8 with 4.25 Big Bore Kit 4.25in Head/Base Gasket Kit .030-.014 MLS
Regular price
$100.08
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All parts come with the essentials you need for a smooth fit and clear instructions. From performance upgrades to custom styling, unbox and get your ride ready with confidence!
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Cylinder Head and Base Gasket Kits for 124" and 128", oil-cooled or water-cooled models, with 4.25" Big Bore Cylinders. This is a strictly bolt-on kit, as the special gaskets eliminate the need to weld and modify oil or water passages. Gasket kits are available with either .030" or .040" thick gaskets . The Cylinders are offered in a factory-style black texture finish with highlighted fins. Cast-iron liners ensure strength, durability and quiet operation.
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2018-2020 | Harley-Davidson | FLDE Deluxe 107 | Base |
| 2018-2019 | Harley-Davidson | FLFB Fat Boy 107 | Base |
| 2025 | Harley-Davidson | FLFB Fat Boy 117 | Base |
| 2018-2024 | Harley-Davidson | FLFBS Fat Boy 114 | Base |
| 2021 | Harley-Davidson | FLH Electra Glide Revival | Base |
| 2018-2021 | Harley-Davidson | FLHC Heritage Classic 107 | Base |
| 2025 | Harley-Davidson | FLHC Heritage Classic 117 | Base |
| 2018-2024 | Harley-Davidson | FLHCS Heritage Classic 114 | Base |
| 2023 | Harley-Davidson | FLHFB Electra Glide Highway King | Base |
| 2017-2022 | Harley-Davidson | FLHR Road King | Base |
| 2017-2025 | Harley-Davidson | FLHRXS Road King Special | Base |
| 2019-2022 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 2017-2019 | Harley-Davidson | FLHTCU Electra Glide Ultra Classic | Base |
| 2017-2021,2023-2025 | Harley-Davidson | FLHTCUTG Tri Glide Ultra | Base |
| 2020-2022 | Harley-Davidson | FLHTCUTGSE CVO Tri Glide | Base |
| 2017-2024 | Harley-Davidson | FLHTK Ultra Limited | Base |
| 2017-2019 | Harley-Davidson | FLHTKL Ultra Limited Low | Base |
| 2017-2021 | Harley-Davidson | FLHTKSE CVO Limited | Base |
| 2017-2025 | Harley-Davidson | FLHX Street Glide | Base |
| 2017-2023 | Harley-Davidson | FLHXS Street Glide Special | Base |
| 2017-2025 | Harley-Davidson | FLHXSE CVO Street Glide | Base |
| 2022-2023 | Harley-Davidson | FLHXST Street Glide ST | Base |
| 2025 | Harley-Davidson | FLHXU Street Glide Ultra | Base |
| 2024 | Harley-Davidson | FLI Hydra-Glide Revival | Base |
| 2017-2025 | Harley-Davidson | FLRT Freewheeler | Base |
| 2018-2021 | Harley-Davidson | FLSB Sport Glide 107 | Base |
| 2018-2021 | Harley-Davidson | FLSL Softail Slim 107 | Base |
| 2025 | Harley-Davidson | FLSTFI Fat Boy Gray Ghost | Base |
| 2020-2024 | Harley-Davidson | FLTRK Road Glide Limited | Base |
| 2022-2023 | Harley-Davidson | FLTRKSE CVO Road Glide Limited | Base |
| 2023-2025 | Harley-Davidson | FLTRT Road Glide 3 | Base |
| 2017-2019 | Harley-Davidson | FLTRU Road Glide Ultra | Base |
| 2017-2025 | Harley-Davidson | FLTRX Road Glide | Base |
| 2017-2023 | Harley-Davidson | FLTRXS Road Glide Special | Base |
| 2018-2025 | Harley-Davidson | FLTRXSE CVO Road Glide | Base |
| 2022-2023 | Harley-Davidson | FLTRXST Road Glide ST | Base |
| 2024-2025 | Harley-Davidson | FLTRXSTSE CVO Road Glide ST | Base |
| 2018-2020 | Harley-Davidson | FXBB Street Bob 107 | Base |
| 2025 | Harley-Davidson | FXBB Street Bob 117 | Base |
| 2021-2024 | Harley-Davidson | FXBBS Street Bob 114 | Base |
| 2018-2019 | Harley-Davidson | FXBR Breakout 107 | Base |
| 2023-2025 | Harley-Davidson | FXBR Breakout 117 | Base |
| 2018-2020 | Harley-Davidson | FXBRS Breakout 114 | Base |
| 2019-2020 | Harley-Davidson | FXDRS FXDR 114 | Base |
| 2018-2019 | Harley-Davidson | FXFB Fat Bob 107 | Base |
| 2018-2023 | Harley-Davidson | FXFBS Fat Bob 114 | Base |
| 2018-2020 | Harley-Davidson | FXLR Low Rider 107 | Base |
| 2020-2021 | Harley-Davidson | FXLRS Low Rider S 114 | Base |
| 2022-2025 | Harley-Davidson | FXLRS Low Rider S 117 | Base |
| 2022-2025 | Harley-Davidson | FXLRST Low Rider ST 117 | Base |
| 2022 | Harley-Davidson | FXRST Low Rider El Diablo 117 | Base |
| 2020-2024 | Harley-Davidson | FXST Softail Standard 107 | Base |
