Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.

• Big Bore Kit
• Big-bore bolt-on kit increases 114″/117″ with 4-1/2″ stroke M-Eight to 128″ with no case machining required
• 4-1/4″ bore cylinders with 11:1 forged pistons
• Oil Pump/Cam Plate
• S&S oil pump/cam plate with blue anodized finish
• Passage plugs are removable for servicing
• Independent scavenge sections for flywheel cavity and cam chest
• Debris screen in both scavenge pickups
• Magnet in cam chest to help prevent debris from entering the oil pump
• Increased oil flow capacity on both the oil feed and scavenge side
• Adjustable pressure relief valve can be adjusted with the unit installed in the engine
• Pushrods
• Quikee pushrods with chrome pushrod tubes
• Tappets
• S&S premium tappets
• Tappet Cuffs
• S&S hard-anodized, black coated tappet cuffs are billet aluminum construction
• Improve tappet stability in high-lift, high-rpm situations
• Cam
• S&S 550 cams designed for big bore applications
• Valve Springs
• S&S valve springs work with cams up to .605″ lift
• High-performance conical single-wire spring design
• All necessary gaskets, bearings and hardware for bolt-on installation is included
• Made in the U.S.A.
• Fitments 

  2022	Harley-Davidson	Softail Low Rider ST FXLRST	–	–
  2022	Harley-Davidson	Road Glide ST FLTRXST	–	–
  2022	Harley-Davidson	Street Glide ST FLHXST	–	–
  2021	Harley-Davidson	Electra Glide Revival	–	–
  2020-2022	Harley-Davidson	Softail Low Rider S FXLRS	–	–
  2020-2022	Harley-Davidson	Softail Standard FXST	–	–
  2019-2022	Harley-Davidson	Electra Glide Standard EFI FLHTI	–	–
  2019-2020	Harley-Davidson	FXDR 114	–	–
  2018-2022	Harley-Davidson	Softail Heritage Classic 114 FLHCS	–	–
  2018-2022	Harley-Davidson	Softail Fat Bob 114 FXFBS	–	–
  2018-2022	Harley-Davidson	Softail Fat Boy 114 FLFBS	–	–
  2018-2022	Harley-Davidson	Softail Street Bob FXBB	–	–
  2018-2022	Harley-Davidson	CVO Road Glide Custom FLTRXSE	–	–
  2018-2021	Harley-Davidson	Softail Heritage Classic FLHC	–	–
  2018-2021	Harley-Davidson	Softail Sport Glide FLSB	–	–
  2018-2021	Harley-Davidson	Softail Slim FLSL	–	–
  2018-2020	Harley-Davidson	Softail Deluxe FLDE	–	–
  2018-2020	Harley-Davidson	Softail Low Rider FXLR	–	–
  2018-2020	Harley-Davidson	Softail Breakout 114 FXBRS	–	–
  2018-2019	Harley-Davidson	Softail Breakout FXBR	–	–
  2018-2019	Harley-Davidson	Softail Fat Bob FXFB	–	–
  2018-2019	Harley-Davidson	Softail Fat Boy FLFB	–	–
  2017-2022	Harley-Davidson	Road King Special FLHRXS	–	–
  2017-2022	Harley-Davidson	Street Glide Special FLHXS	–	–
  2017-2022	Harley-Davidson	Road Glide Special FLTRXS	–	–
  2017-2022	Harley-Davidson	Road King EFI FLHR	–	–
  2017-2022	Harley-Davidson	Street Glide EFI FLHX	–	–
  2017-2022	Harley-Davidson	Road Glide Custom FLTRX	–	–
  2017-2022	Harley-Davidson	CVO Street Glide FLHXSE	–	–
  2017-2021	Harley-Davidson	Electra Glide Police FLHTPI	–	–
  2017-2019	Harley-Davidson	Road Glide Ultra FLTRU	–	–
  2017-2019	Harley-Davidson	Electra Glide Ultra Classic EFI FLHTCUI	–	–
  2017	Harley-Davidson	Fat Boy S FLSTFBS	–	–
  2017	Harley-Davidson	Softail Slim FLS	–	–
  2017	Harley-Davidson	CVO Pro Street Breakout FXSE	–	–
  2017	Harley-Davidson	Softail Slim S FLSS	–	–
  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	–	–