Installing this 3-5/8" big bore kit will increase the displacement of stock 80" HD® Evolution® big twin engines to 88" using the stock 4-1/4" flywheels. The kit includes S&S 3-5/8" bore cylinders, 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.
Fitment
| Year(s) | Make | Model Code | Model |
|---|---|---|---|
| 1984-1999 | Harley-Davidson | — | Big Twin |
| Year | Make | Model |
|---|---|---|
| 1984 | Harley-Davidson | FLHS Electra Glide Sport |
| 1984 | Harley-Davidson | FXST Softail Standard |
| 1985 | Harley-Davidson | FXST Softail Standard |
| 1986 | Harley-Davidson | FLHT Electra Glide Standard |
| 1986 | Harley-Davidson | FLST Heritage Softail |
| 1986 | Harley-Davidson | FXR Super Glide II |
| 1986 | Harley-Davidson | FXST Softail Standard |
| 1987 | Harley-Davidson | FLHS Electra Glide Sport |
| 1987 | Harley-Davidson | FLHT Electra Glide Standard |
| 1987 | Harley-Davidson | FLST Heritage Softail |
| 1987 | Harley-Davidson | FXR Super Glide II |
| 1987 | Harley-Davidson | FXST Softail Standard |
| 1988 | Harley-Davidson | FLHS Electra Glide Sport |
| 1988 | Harley-Davidson | FLHT Electra Glide Standard |
| 1988 | Harley-Davidson | FLST Heritage Softail |
| 1988 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1988 | Harley-Davidson | FXR Super Glide II |
| 1988 | Harley-Davidson | FXST Softail Standard |
| 1988 | Harley-Davidson | FXSTS Springer Softail |
| 1989 | Harley-Davidson | FLHS Electra Glide Sport |
| 1989 | Harley-Davidson | FLHT Electra Glide Standard |
| 1989 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1989 | Harley-Davidson | FLST Heritage Softail |
| 1989 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1989 | Harley-Davidson | FLTC Tour Glide Classic |
| 1989 | Harley-Davidson | FXR Super Glide II |
| 1989 | Harley-Davidson | FXST Softail Standard |
| 1989 | Harley-Davidson | FXSTS Springer Softail |
| 1990 | Harley-Davidson | FLHS Electra Glide Sport |
| 1990 | Harley-Davidson | FLHT Electra Glide Standard |
| 1990 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1990 | Harley-Davidson | FLST Heritage Softail |
| 1990 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1990 | Harley-Davidson | FLSTF Fat Boy |
| 1990 | Harley-Davidson | FLTC Tour Glide Classic |
| 1990 | Harley-Davidson | FXR Super Glide II |
| 1990 | Harley-Davidson | FXST Softail Standard |
| 1990 | Harley-Davidson | FXSTS Springer Softail |
| 1991 | Harley-Davidson | FLHS Electra Glide Sport |
| 1991 | Harley-Davidson | FLHT Electra Glide Standard |
| 1991 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1991 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1991 | Harley-Davidson | FLSTF Fat Boy |
| 1991 | Harley-Davidson | FLTC Tour Glide Classic |
| 1991 | Harley-Davidson | FXR Super Glide II |
| 1991 | Harley-Davidson | FXST Softail Standard |
| 1991 | Harley-Davidson | FXSTS Springer Softail |
| 1992 | Harley-Davidson | FLHS Electra Glide Sport |
| 1992 | Harley-Davidson | FLHT Electra Glide Standard |
| 1992 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1992 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1992 | Harley-Davidson | FLSTF Fat Boy |
| 1992 | Harley-Davidson | FLTC Tour Glide Classic |
| 1992 | Harley-Davidson | FXDB-D Dyna Glide Daytona |
| 1992 | Harley-Davidson | FXDC Super Glide Custom |
| 1992 | Harley-Davidson | FXR Super Glide II |
| 1992 | Harley-Davidson | FXST Softail Standard |
| 1992 | Harley-Davidson | FXSTS Springer Softail |
| 1993 | Harley-Davidson | FLHS Electra Glide Sport |
| 1993 | Harley-Davidson | FLHT Electra Glide Standard |
| 1993 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1993 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1993 | Harley-Davidson | FLSTF Fat Boy |
| 1993 | Harley-Davidson | FLSTN Heritage Softail Nostalgia |
| 1993 | Harley-Davidson | FLTC Tour Glide Classic |
| 1993 | Harley-Davidson | FXDL Dyna Low Rider |
| 1993 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 1993 | Harley-Davidson | FXR Super Glide II |
| 1993 | Harley-Davidson | FXST Softail Standard |
| 1993 | Harley-Davidson | FXSTS Springer Softail |
| 1994 | Harley-Davidson | FLHR Road King |
| 1994 | Harley-Davidson | FLHT Electra Glide Standard |
| 1994 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1994 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1994 | Harley-Davidson | FLSTF Fat Boy |
| 1994 | Harley-Davidson | FLSTN Heritage Softail Special |
| 1994 | Harley-Davidson | FXDL Dyna Low Rider |
| 1994 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 1994 | Harley-Davidson | FXR Super Glide II |
| 1994 | Harley-Davidson | FXST Softail Standard |
| 1994 | Harley-Davidson | FXSTS Springer Softail |
| 1995 | Harley-Davidson | FLHR Road King |
| 1995 | Harley-Davidson | FLHT Electra Glide Standard |
| 1995 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1995 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1995 | Harley-Davidson | FLSTF Fat Boy |
| 1995 | Harley-Davidson | FLSTN Heritage Softail Special |
| 1995 | Harley-Davidson | FXD Dyna Super Glide |
| 1995 | Harley-Davidson | FXDL Dyna Low Rider |
| 1995 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 1995 | Harley-Davidson | FXST Softail Standard |
| 1995 | Harley-Davidson | FXSTS Springer Softail |
| 1995 | Harley-Davidson | FXSTSB Bad Boy |
| 1996 | Harley-Davidson | FLHR Road King |
| 1996 | Harley-Davidson | FLHT Electra Glide Standard |
| 1996 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1996 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1996 | Harley-Davidson | FLSTF Fat Boy |
| 1996 | Harley-Davidson | FLSTN Heritage Softail Special |
| 1996 | Harley-Davidson | FLTCUI Tour Glide Ultra Classic |
| 1996 | Harley-Davidson | FXST Softail Standard |
| 1996 | Harley-Davidson | FXSTS Springer Softail |
| 1996 | Harley-Davidson | FXSTSB Bad Boy |
| 1997 | Harley-Davidson | FLHR Road King |
| 1997 | Harley-Davidson | FLHT Electra Glide Standard |
| 1997 | Harley-Davidson | FLHTC Electra Glide Classic |
| 1997 | Harley-Davidson | FXD Dyna Super Glide |
| 1997 | Harley-Davidson | FXDL Dyna Low Rider |
| 1997 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 1998 | Harley-Davidson | FLHR Road King |
| 1998 | Harley-Davidson | FLHT Electra Glide Standard |
| 1998 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1998 | Harley-Davidson | FLSTF Fat Boy |
| 1998 | Harley-Davidson | FLSTS Heritage Springer |
| 1998 | Harley-Davidson | FLTR Road Glide |
| 1998 | Harley-Davidson | FXD Dyna Super Glide |
| 1998 | Harley-Davidson | FXDL Dyna Low Rider |
| 1998 | Harley-Davidson | FXDWG Dyna Wide Glide |
| 1998 | Harley-Davidson | FXST Softail Standard |
| 1998 | Harley-Davidson | FXSTS Springer Softail |
| 1999 | Harley-Davidson | FLSTC Heritage Softail Classic |
| 1999 | Harley-Davidson | FLSTF Fat Boy |
| 1999 | Harley-Davidson | FLSTS Heritage Springer |
| 1999 | Harley-Davidson | FXST Softail Standard |
| 1999 | Harley-Davidson | FXSTB Night Train |
| 1999 | Harley-Davidson | FXSTS Springer Softail |
Fitment details provided by supplier.
