Description

S&S Cycle 129″ Big Bore Kit for M8

• Huge bore increase (4.320″) means huge power increase
• Retains stock engine height
• Powder coat finish match factory finish, giving the bike a “sleeper” advantage
• Works with stock crankcases
• MLS (multi-layered steel) head gaskets
• Original engine serial numbers are retained
• Includes Cam Cover Badge

Fits:

2021 Harley-Davidson Electra Glide Revival – –
2020-2021 Harley-Davidson Softail Low Rider S FXLRS – –
2020-2021 Harley-Davidson Road Glide Limited FLTRK – –
2020-2021 Harley-Davidson Softail Standard FXST – –
2019-2021 Harley-Davidson Electra Glide Standard EFI FLHTI – –
2019-2020 Harley-Davidson FXDR 114 – –
2018-2021 Harley-Davidson Softail Slim FLSL – –
2018-2021 Harley-Davidson Softail Heritage Classic 114 FLHCS – –
2018-2021 Harley-Davidson Softail Fat Bob 114 FXFBS – –
2018-2021 Harley-Davidson Softail Street Bob FXBB – –
2018-2021 Harley-Davidson Softail Heritage Classic FLHC – –
2018-2021 Harley-Davidson Softail Sport Glide FLSB – –
2018-2021 Harley-Davidson Softail Fat Boy 114 FLFBS – –
2018-2021 Harley-Davidson CVO Road Glide Custom FLTRXSE – –
2018-2020 Harley-Davidson Softail Breakout 114 FXBRS – –
2018-2020 Harley-Davidson Softail Deluxe FLDE – –
2018-2020 Harley-Davidson Softail Low Rider FXLR – –
2018-2019 Harley-Davidson Softail Fat Boy FLFB – –
2018-2019 Harley-Davidson Softail Breakout FXBR – –
2018-2019 Harley-Davidson Softail Fat Bob FXFB – –
2017-2021 Harley-Davidson Road Glide Special FLTRXS – –
2017-2021 Harley-Davidson Road Glide Custom FLTRX – –
2017-2021 Harley-Davidson Electra Glide Police FLHTPI – –
2017-2021 Harley-Davidson Street Glide EFI FLHX – –
2017-2021 Harley-Davidson Electra Glide Ultra Limited FLHTK – –
2017-2021 Harley-Davidson Street Glide Special FLHXS – –
2017-2021 Harley-Davidson Road King Special FLHRXS – –
2017-2021 Harley-Davidson CVO Electra Glide Ultra Limited FLHTKSE – –
2017-2021 Harley-Davidson CVO Street Glide FLHXSE – –
2017-2021 Harley-Davidson Road King EFI FLHR – –
2017-2019 Harley-Davidson Electra Glide Ultra Limited Low FLHTKL – –
2017-2019 Harley-Davidson Road Glide Ultra FLTRU – –
2017-2019 Harley-Davidson Electra Glide Ultra Classic EFI FLHTCUI