This 3-5/8" big bore kit will increase the displacement of stock 80" Evolution big twin engines to 88" using the stock 4-1/4" flywheels. The kit includes S&S 3-5/8" borecylinders, 3-5/8" bore flat topped forged pistons with rings and wristpins, head gaskets, base gaskets, exhcaust gaskets, and instructions. The cylinders are shorter than stock, so shorter pushrods, and shorter manifold will be needed to complete the engine. Stock cases will need to be bored out to 3 5/8".
This Part Fits:
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1994-1998 | Harley-Davidson | FLHR Road King | Base |
| 1984,1987-1993 | Harley-Davidson | FLHS Electra Glide Sport | Base |
| 1986-1998 | Harley-Davidson | FLHT Electra Glide Standard | Base |
| 1989-1997 | Harley-Davidson | FLHTC Electra Glide Classic | Base |
| 1986-1990 | Harley-Davidson | FLST Heritage Softail | Base |
| 1988-1995,1997-1999 | Harley-Davidson | FLSTC Heritage Softail Classic | Base |
| 1990-1995,1997-1999 | Harley-Davidson | FLSTF Fat Boy | Base |
| 1993 | Harley-Davidson | FLSTN Heritage Softail Nostalgia | Base |
| 1994-1995 | Harley-Davidson | FLSTN Heritage Softail Special | Base |
| 1997-1999 | Harley-Davidson | FLSTS Heritage Springer | Base |
| 1989-1993 | Harley-Davidson | FLTC Tour Glide Classic | Base |
| 1996 | Harley-Davidson | FLTCUI Tour Glide Ultra Classic | Base |
| 1998 | Harley-Davidson | FLTR Road Glide | Base |
| 1995-1998 | Harley-Davidson | FXD Dyna Super Glide | Base |
| 2016 | Harley-Davidson | FXDB Street Bob | Base |
| 1992 | Harley-Davidson | FXDB-D Dyna Glide Daytona | Base |
| 1992 | Harley-Davidson | FXDC Super Glide Custom | Base |
| 2016 | Harley-Davidson | FXDF Fat Bob | Base |
| 1993-1998,2016 | Harley-Davidson | FXDL Dyna Low Rider | Base |
| 2016 | Harley-Davidson | FXDL Low Rider | Base |
| 2016 | Harley-Davidson | FXDLS Low Rider S | Base |
| 1993-1998,2016 | Harley-Davidson | FXDWG Dyna Wide Glide | Base |
| 1986-1994 | Harley-Davidson | FXR Super Glide II | Base |
| 1984-1995,1997-1999 | Harley-Davidson | FXST Softail Standard | Base |
| 1999 | Harley-Davidson | FXSTB Night Train | Base |
| 1988-1995,1997-1999 | Harley-Davidson | FXSTS Springer Softail | Base |
| 1995,1997 | Harley-Davidson | FXSTSB Bad Boy | Base |
