S&S has been building big bore kits since the 60s and has it down to an absolute science. Our latest efforts are aimed at the Milwaukee Eight platform (2017 and newer big twins) and open up a whole new level of performance for these engines. Combining a new design forged piston with their 4.25" cylinders to net a tire melting 131 cubic inches when paired with their 4.625" stroker crank. We build our big bore kits and cranks to much tighter tolerarances and with higher quality materials than the factory parts. This new piston/cylinder kit will be a solid platform for massive power.
Fitment:
2017 Harley Davidson FLHR Road King Base
2017 Harley Davidson FLHRC Road King Classic Base
2017 Harley Davidson FLHRXS Road King Special Base
2017 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2017 Harley Davidson FLHTK Ultra Limited Base
2017 Harley Davidson FLHTKL Ultra Limited Low Base
2017 Harley Davidson FLHTKSE CVO Limited Base
2017 Harley Davidson FLHX Street Glide Base
2017 Harley Davidson FLHXS Street Glide Special Base
2017 Harley Davidson FLHXSE CVO Street Glide Base
2017 Harley Davidson FLRT Freewheeler Base
2017 Harley Davidson FLTRU Road Glide Ultra Base
2017 Harley Davidson FLTRX Road Glide Base
2017 Harley Davidson FLTRXS Road Glide Special Base
2018 Harley Davidson FLFBS Fat Boy 114 Base
2018 Harley Davidson FLHCS Heritage Classic 114 Base
2018 Harley Davidson FLHR Road King Base
2018 Harley Davidson FLHRC Road King Classic Base
2018 Harley Davidson FLHRXS Road King Special Base
2018 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2018 Harley Davidson FLHTK Ultra Limited Base
2018 Harley Davidson FLHTKL Ultra Limited Low Base
2018 Harley Davidson FLHTKSE CVO Limited Base
2018 Harley Davidson FLHX Street Glide Base
2018 Harley Davidson FLHXS Street Glide Special Base
2018 Harley Davidson FLHXSE CVO Street Glide Base
2018 Harley Davidson FLRT Freewheeler Base
2018 Harley Davidson FLTRU Road Glide Ultra Base
2018 Harley Davidson FLTRX Road Glide Base
2018 Harley Davidson FLTRXS Road Glide Special Base
2018 Harley Davidson FXBRS Breakout 114 Base
2018 Harley Davidson FXFBS Fat Bob 114 Base
2019 Harley Davidson FLFBS Fat Boy 114 Base
2019 Harley Davidson FLHCS Heritage Classic 114 Base
2019 Harley Davidson FLHR Road King Base
2019 Harley Davidson FLHRC Road King Classic Base
2019 Harley Davidson FLHRXS Road King Special Base
2019 Harley Davidson FLHT Electra Glide Standard Base
2019 Harley Davidson FLHTCU Electra Glide Ultra Classic Base
2019 Harley Davidson FLHTK Ultra Limited Base
2019 Harley Davidson FLHTKL Ultra Limited Low Base
2019 Harley Davidson FLHTKSE CVO Limited Base
2019 Harley Davidson FLHX Street Glide Base
2019 Harley Davidson FLHXS Street Glide Special Base
2019 Harley Davidson FLHXSE CVO Street Glide Base
2019 Harley Davidson FLRT Freewheeler Base
2019 Harley Davidson FLTRU Road Glide Ultra Base
2019 Harley Davidson FLTRX Road Glide Base
2019 Harley Davidson FLTRXS Road Glide Special Base
2019 Harley Davidson FXBRS Breakout 114 Base
2019 Harley Davidson FXDRS FXDR 114 Base
2019 Harley Davidson FXFBS Fat Bob 114 Base
2020 Harley Davidson FLFBS Fat Boy 114 Base
2020 Harley Davidson FLHCS Heritage Classic 114 Base
2020 Harley Davidson FLHR Road King Base
2020 Harley Davidson FLHRXS Road King Special Base
2020 Harley Davidson FLHT Electra Glide Standard Base
2020 Harley Davidson FLHTCUTGSE CVO Tri Glide Base
2020 Harley Davidson FLHTK Ultra Limited Base
2020 Harley Davidson FLHTKL Ultra Limited Low Base
2020 Harley Davidson FLHTKSE CVO Limited Base
2020 Harley Davidson FLHX Street Glide Base
2020 Harley Davidson FLHXS Street Glide Special Base
2020 Harley Davidson FLHXSE CVO Street Glide Base
2020 Harley Davidson FLRT Freewheeler Base
2020 Harley Davidson FLTRK Road Glide Limited Base
2020 Harley Davidson FLTRU Road Glide Ultra Base
2020 Harley Davidson FLTRX Road Glide Base
2020 Harley Davidson FLTRXS Road Glide Special Base
2020 Harley Davidson FXBRS Breakout 114 Base
2020 Harley Davidson FXDRS FXDR 114 Base
2020 Harley Davidson FXFBS Fat Bob 114 Base
- air_freight_prohibited:
- false
- not_carb_approved:
- true
- carb_acknowledgement_required:
- true
- ltl_freight_required:
- false
- prop_65:
- Unknown
- part_type:
- powersports
- epa:
- N/A
- regular_stock:
- false
