description

For large displacement motors with compression ratios of 10.5-11.5:1 or smaller motors with 11:1-12:1 compression ratio. Does not require as much compression as the 631 and provides a more linear power delivery. 3000-6000 RPm.

fitment

• FLHR Road King 1994-1998
• FLHRCI Road King Classic 1998
• FLHRI Road King 1996-1997
• FLHS Electra Glide Sport 1987-1993
• FLHT Electra Glide Standard 1986-1987
• FLHT Electra Glide Standard 1995-1998
• FLHTC Electra Glide Classic 1984-1998
• FLHTCI Electra Glide Classic 1996-1998
• FLHTCU Electra Glide Ultra Classic 1989-1997
• FLHTCUI Electra Glide Ultra Classic 1995-1998
• FLST Heritage Softail 1986-1990
• FLSTC Heritage Softail Classic 1988-1999
• FLSTF Fat Boy 1990-1999
• FLSTN Heritage Softail Nostalgia 1993
• FLSTN Heritage Softail Special 1994-1996
• FLSTS Heritage Springer 1997-1999
• FLTC Tour Glide Classic 1984-1991
• FLTCU Tour Glide Ultra Classic 1989-1995
• FLTCUI Tour Glide Ultra Classic 1996
• FLTR Road Glide 1998
• FLTRI Road Glide 1998
• FXD Dyna Super Glide 1995-1998
• FXDB-D Dyna Glide Daytona 1992
• FXDB-S Dyna Glide Sturgis 1991
• FXDC Super Glide Custom 1992
• FXDL Dyna Low Rider 1993-1998
• FXDS-Conv Dyna Convertible 1994-1998
• FXDWG Dyna Wide Glide 1993-1998
• FXLR Low Rider Custom 1987-1994
• FXR Super Glide II 1986-1994
• FXRC Low Rider Chrome 1987
• FXRD Sport Glide Grand Touring 1986
• FXRDG Disc Glide 1984
• FXRS Low Glide 1984-1992
• FXRS-Conv Low Rider Sport Convertible 1990-1993
• FXRS-SP Low Rider Sport 1986-1993
• FXRT Sport Glide 1984-1992
• FXST Softail Standard 1984-1990
• FXST Softail Standard 1999
• FXSTB Night Train 1999
• FXSTC Softail Custom 1986-1999
• FXSTS Springer Softail 1988-1999
• FXSTSB Bad Boy 1995-1997