Product Description
Turn your stock 114/117" into a monster with S&S 132" Big Bore Power Package for Harley M8 motors. Kit is designed to fit Gear Drive / Water Cooled Milwaukee Eight models Only. This is S&S's largest big bore cylinders (4.32") with matched cam/cam plate/ oil pump and everything else a high performance cam chest needs to make big, reliable horsepower, Choose either Black with Highlight or Granite Cylinder finish. Requires S&S Cycle Head Bolts for M8, part number 900-1006. These kits only come with Chrome Pushrods Tubes. Click HERE to grab a Black Pushrod set.
Fits: Harley M8 Models (Water Cooled)
Big Bore Kit:
- Available in Black with Highlight or Granite Finish
- Bolt-On Kit — No Case Machining Required
- 4.320" Bore
- Forged Pistons
- 11.1 Compression Ratio
Oil Pump/Cam Plate:
- Precision Machined from Billet Aluminum
- Independent Scavenge Sections for Flywheel Cavity & Cam Chest
- Debris Screens in Both Scavenge Pickups
- Magnet in Cam Chest to Help to Stop Debris from Entering Oil Pump
- 44% Flow Increase on Supply Side & 58% Flow Increase on Scavenge Side
- Pressure Relief Valve is Adjustable with Unit Installed in Engine
- Kits Now Include Updated Oil Pump with Groove for Optional OEM Oil Seal
Pushrods:
- Quickee Pushrods
- Chrome Pushrod Tubes. Click HERE for the Black Pushrod Tube Set
Tappets:
- Hand Assembled to Exacting Tolerances
Tappet Cuffs:
- Hard Anodized Black Coating
- Billet Aluminum Construction
- Stronger than Stock Material Eliminates Distortion
- Improve Tappet Stability in High Lift & High rpm Situations
Cam:
- S&S 550 Cam- Designed for Big Bore Applications
- Gear Drive Applications
- Gear Drive Kits Provide Improved Cam Timing Accuracy & Eliminate Stock Chain Tensioner
- Gear Drive Kits Include Outer Drive Gears
Valve Springs:
- Work well with cams up to .605 lift
- High Performance Conical Single Wire Spring
- Includes Top Collars, Keepers, & Valve Seals/Bottom Collars
Not recommended for Tri-Glide or other three wheel models including conversion due to lugging nature of these bikes.
DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
Fitment
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 | - | - |
2021 | Harley-Davidson | Electra Glide Revival | - | - |
2020-2023 | Harley-Davidson | Road Glide Limited FLTRK | - | - |
2020-2023 | Harley-Davidson | Softail Low Rider S FXLRS | - | - |
2020-2023 | Harley-Davidson | Softail Standard FXST | - | - |
2019-2022 | Harley-Davidson | Electra Glide Standard EFI FLHTI | - | - |
2019-2020 | Harley-Davidson | FXDR 114 | - | - |
2018-2023 | Harley-Davidson | Softail Fat Boy 114 FLFBS | - | - |
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 | - | - |
2018-2022 | Harley-Davidson | CVO Road Glide Custom FLTRXSE | - | - |
2018-2021 | Harley-Davidson | Softail Slim FLSL | - | - |
2018-2021 | Harley-Davidson | Softail Heritage Classic FLHC | - | - |
2018-2021 | Harley-Davidson | Softail Sport Glide FLSB | - | - |
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 Boy FLFB | - | - |
2018-2019 | Harley-Davidson | Softail Fat Bob FXFB | - | - |
2017-2023 | Harley-Davidson | Electra Glide Ultra Limited FLHTK | - | - |
2017-2023 | Harley-Davidson | Road Glide Special FLTRXS | - | - |
2017-2023 | Harley-Davidson | Street Glide Special FLHXS | - | - |
2017-2023 | Harley-Davidson | Road King Special FLHRXS | - | - |
2017-2023 | Harley-Davidson | Road Glide Custom FLTRX | - | - |
2017-2023 | Harley-Davidson | Street Glide EFI FLHX | - | - |
2017-2022 | Harley-Davidson | CVO Street Glide FLHXSE | - | - |
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 | - | - |
Black w/ Highlight - Chrome Pushrods | 310-1230 |
Granite w/ Highlight | 310-1236 |