S&S Cycle Cylinder Stud & Head Bolt Kit for '17-Up Harley Davidson M8 Engines
Studs
- 8 studs with rounded thread roots, rather than flat, improving fatigue strength
- 4140 Chrome Moly studs, oil quenched and tempered to 39-44 HRC
- Positive stop shoulder allows for consistent installed height
- 180,000 psi tensile strength
Head Bolts
- Reusable
- 14% increase in strength over stock
- Heat treated 8640 steel
- 200,000 psi ultimate tensile strength
- 8 - head bolts with integral washer
- Formed threads
- Cold formed head
- Compatible with both MLS & graphite head gaskets
Fitments
| 2023 | Harley-Davidson | Road Glide 3 FLTRT |
| 2023 | Harley-Davidson | Electra Glide Highway King FLHFB |
| 2022-2023 | Harley-Davidson | CVO Road Glide Limited |
| 2022-2023 | Harley-Davidson | Softail Low Rider ST FXLRST |
| 2022-2023 | Harley-Davidson | Road Glide ST FLTRXST |
| 2022-2023 | Harley-Davidson | Street Glide ST FLHXST |
| 2022 | Harley-Davidson | Softail Low Rider El Diablo FXRST |
| 2021 | Harley-Davidson | Electra Glide Revival |
| 2020-2023 | Harley-Davidson | Softail Low Rider S FXLRS |
| 2020-2023 | Harley-Davidson | Softail Standard FXST |
| 2020-2023 | Harley-Davidson | Road Glide Limited FLTRK |
| 2020-2022 | Harley-Davidson | CVO Tri Glide FLHTCUTGSE |
| 2019-2022 | Harley-Davidson | Electra Glide Standard EFI FLHTI |
| 2019-2020 | Harley-Davidson | FXDR 114 |
| 2018-2023 | Harley-Davidson | CVO Road Glide Custom FLTRXSE |
| 2018-2023 | Harley-Davidson | Softail Fat Bob 114 FXFBS |
| 2018-2023 | Harley-Davidson | Softail Heritage Classic 114 FLHCS |
| 2018-2023 | Harley-Davidson | Softail Street Bob FXBB |
| 2018-2023 | Harley-Davidson | Softail Fat Boy 114 FLFBS |
| 2018-2021 | Harley-Davidson | Softail Sport Glide FLSB |
| 2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC |
| 2018-2021 | Harley-Davidson | Softail Slim FLSL |
| 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, 2023 | Harley-Davidson | Softail Breakout FXBR |
| 2018-2019 | Harley-Davidson | Softail Fat Bob FXFB |
| 2018-2019 | Harley-Davidson | Softail Fat Boy FLFB |
| 2017-2023 | Harley-Davidson | Electra Glide Ultra Limited FLHTK |
| 2017-2023 | Harley-Davidson | Street Glide Special FLHXS |
| 2017-2023 | Harley-Davidson | Road Glide Special FLTRXS |
| 2017-2023 | Harley-Davidson | Freewheeler FLRT |
| 2017-2023 | Harley-Davidson | CVO Street Glide FLHXSE |
| 2017-2023 | Harley-Davidson | Street Glide EFI FLHX |
| 2017-2023 | Harley-Davidson | Road Glide Custom FLTRX |
| 2017-2023 | Harley-Davidson | Road King Special FLHRXS |
| 2017-2023 | Harley-Davidson | Tri Glide Ultra Classic FLHTCUTG |
| 2017-2022 | Harley-Davidson | Road King EFI FLHR |
| 2017-2021 | Harley-Davidson | CVO Electra Glide Ultra Limited FLHTKSE |
| 2017-2021 | Harley-Davidson | Electra Glide Police FLHTPI |
| 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 |
| 2017 | Harley-Davidson | Softail Slim FLS |
| 2017 | Harley-Davidson | Fat Boy S FLSTFBS |
| 2017 | Harley-Davidson | Softail Slim S FLSS |
| 2017 | Harley-Davidson | CVO Pro Street Breakout FXSE |
| 2017 | Harley-Davidson | Fat Boy Lo FLSTFB |
| 2017 | Harley-Davidson | Softail Fat Boy EFI FLSTFI |
| 2017 | Harley-Davidson | Softail Deluxe EFI FLSTNI |
| 2017 | Harley-Davidson | Softail Heritage Classic EFI FLSTCI |
| 2017 | Harley-Davidson | Breakout FXSB |
