551 cams are bolt-in cams for 2005-'16 engines. Cams that exceed the limits of the stock valve springs require the use of special high lift springs. Most S&S cams have higher lift than stock and are designed to take advantage of the extra flow of ported stock heads or S&S Super Stock® heads. Due to the high lift of these cams, S&S adjustable pushrods are recommended. Not all grinds are available in the chain drive version. To get the best performance from a performance cam installation, a high flow intake and exhaust system is also recommended.
This Part Fits:
| Year |
Make |
Model |
Submodel |
| 1999-2006 |
Harley-Davidson |
FLHR Road King |
Base |
| 1999-2006 |
Harley-Davidson |
FLHRCI Road King Classic |
Base |
| 2000-2006 |
Harley-Davidson |
FLHRI Road King |
Base |
| 2004-2006 |
Harley-Davidson |
FLHRS Road King Custom |
Base |
| 1999-2000,2003,2006 |
Harley-Davidson |
FLHT Electra Glide Standard |
Base |
| 1999-2005 |
Harley-Davidson |
FLHTC Electra Glide Classic |
Base |
| 1999-2006 |
Harley-Davidson |
FLHTCI Electra Glide Classic |
Base |
| 1999-2006 |
Harley-Davidson |
FLHTCUI Electra Glide Ultra Classic |
Base |
| 2006 |
Harley-Davidson |
FLHX Street Glide |
Base |
| 2006 |
Harley-Davidson |
FLST Heritage Softail |
Base |
| 1999-2006 |
Harley-Davidson |
FLSTC Heritage Softail Classic |
Base |
| 2001-2006 |
Harley-Davidson |
FLSTCI Heritage Softail Classic |
Base |
| 1999-2006 |
Harley-Davidson |
FLSTF Fat Boy |
Base |
| 2001-2006 |
Harley-Davidson |
FLSTFI Fat Boy |
Base |
| 1999-2006 |
Harley-Davidson |
FLTR Road Glide |
Base |
| 1999-2006 |
Harley-Davidson |
FLTRI Road Glide |
Base |
| 1999-2006 |
Harley-Davidson |
FXD Dyna Super Glide |
Base |
| 1999-2005 |
Harley-Davidson |
FXDL Dyna Low Rider |
Base |
| 2004-2006 |
Harley-Davidson |
FXDLI Dyna Low Rider |
Base |
| 1999-2006 |
Harley-Davidson |
FXDWG Dyna Wide Glide |
Base |
| 2004-2006 |
Harley-Davidson |
FXDWGI Dyna Wide Glide |
Base |
| 1999-2005 |
Harley-Davidson |
FXDX Dyna Super Glide Sport |
Base |
| 2001-2003 |
Harley-Davidson |
FXDXT Dyna Super Glide T-Sport |
Base |
| 2001-2006 |
Harley-Davidson |
FXSTBI Night Train |
Base |
| 2000-2006 |
Harley-Davidson |
FXSTD Softail Deuce |
Base |
| 2001-2006 |
Harley-Davidson |
FXSTDI Softail Deuce |
Base |
| 2003-2004 |
Harley-Davidson |
FXSTDSE Screamin Eagle Softail Deuce |
Base |
| 2001-2006 |
Harley-Davidson |
FXSTI Softail Standard |
Base |
| 1999-2006 |
Harley-Davidson |
FXSTS Springer Softail |
Base |
| 2001-2006 |
Harley-Davidson |
FXSTSI Springer Softail |
Base |