Description
NOTE: Not recommended for trike models.
- Big Bore kit yields excellent results with stock cylinder heads
- Easy installation no need to bore or split existing cases, just swap the cylinders (unless otherwise noted)
- Cylinders are constructed from premium aluminum castings with cast-in iron liners
- Kit includes cylinders, pistons, rings and gaskets (head, base and exhaust)
- Made in the U.S.A.
- Project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.
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COLOR/FINISH HIGHLIGHTED FINS / BLACK GRANITE MATERIAL IRON BORE SIZE 4.250″ DISPLACEMENT 128″ STROKE LENGTH 4-1/2″ COMPRESSION RATIO 11.0:1
| COLOR/FINISH | HIGHLIGHTED FINS / BLACK GRANITE |
| MATERIAL | IRON |
| BORE SIZE | 4.250″ |
| DISPLACEMENT | 128″ |
| STROKE LENGTH | 4-1/2″ |
| COMPRESSION RATIO | 11.0:1 |
| 2020 | Harley-Davidson | Softail Low Rider S FXLRS | – | – |
| 2020 | Harley-Davidson | Road Glide Limited FLTRK | – | – |
| 2020 | Harley-Davidson | Softail Standard FXST | – | – |
| 2019-2020 | Harley-Davidson | FXDR 114 | – | – |
| 2019-2020 | Harley-Davidson | Electra Glide Standard EFI FLHTI | – | – |
| 2018-2020 | Harley-Davidson | Softail Heritage Classic FLHC | – | – |
| 2018-2020 | Harley-Davidson | Softail Low Rider FXLR | – | – |
| 2018-2020 | Harley-Davidson | Softail Street Bob FXBB | – | – |
| 2018-2020 | Harley-Davidson | Softail Breakout 114 FXBRS | – | – |
| 2018-2020 | Harley-Davidson | Softail Deluxe FLDE | – | – |
| 2018-2020 | Harley-Davidson | Softail Fat Bob 114 FXFBS | – | – |
| 2018-2020 | Harley-Davidson | Softail Fat Boy 114 FLFBS | – | – |
| 2018-2020 | Harley-Davidson | Softail Heritage Classic 114 FLHCS | – | – |
| 2018-2020 | Harley-Davidson | Softail Slim FLSL | – | – |
| 2018-2020 | Harley-Davidson | Softail Sport Glide FLSB | – | – |
| 2018-2020 | Harley-Davidson | CVO Road Glide Custom FLTRXSE | – | – |
| 2018-2019 | Harley-Davidson | Softail Fat Bob FXFB | – | – |
| 2018-2019 | Harley-Davidson | Softail Breakout FXBR | – | – |
| 2018-2019 | Harley-Davidson | Softail Fat Boy FLFB | – | – |
| 2017-2020 | Harley-Davidson | Road Glide Special FLTRXS | – | – |
| 2017-2020 | Harley-Davidson | Road King Special FLHRXS | – | – |
| 2017-2020 | Harley-Davidson | Electra Glide Ultra Limited FLHTK | – | – |
| 2017-2020 | Harley-Davidson | Street Glide Special FLHXS | – | – |
| 2017-2020 | Harley-Davidson | CVO Electra Glide Ultra Limited FLHTKSE | – | – |
| 2017-2020 | Harley-Davidson | Electra Glide Police FLHTPI | – | – |
| 2017-2020 | Harley-Davidson | Street Glide EFI FLHX | – | – |
| 2017-2020 | Harley-Davidson | Road King EFI FLHR | – | – |
| 2017-2020 | Harley-Davidson | Road Glide Custom FLTRX | – | – |
| 2017-2020 | Harley-Davidson | CVO Street Glide FLHXSE | – | – |
| 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 | – | – |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer’s information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory a
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