The FOX IFP V-twin rear shocks have an internal floating piston to separate the nitrogen gas from the shock oil, maintaining damping control no matter how long you ride. Most OEM and lower priced shocks don't have a physical barrier inside to prevent the air and oil from mixing. This means through the course of your ride, the oil in your shocks will effectively become thinner as air bubbles get mixed in. As the air mixes with the oil, it causes inconsistent damping, leading to a harsh ride over bumps and often a floaty disconnected feeling from the wheels. Our IFP V-Twin touring shocks will never let air and oil mix no matter how many hours you ride. FOX's IFP design—combined with vehicle specific damping and linear spring rates—gives you a confident connection to the road while soaking up the bumps, mile after mile.
| Year |
Make |
Model |
Submodel |
| 1994-2020 |
Harley-Davidson |
FLHR Road King |
Base |
| 2007-2013 |
Harley-Davidson |
FLHRC Road King Classic |
Base |
| 1998-2006 |
Harley-Davidson |
FLHRCI Road King Classic |
Base |
| 1996-1997,2000-2006 |
Harley-Davidson |
FLHRI Road King |
Base |
| 2004-2007 |
Harley-Davidson |
FLHRS Road King Custom |
Base |
| 2007 |
Harley-Davidson |
FLHRSE3 Screamin Eagle Road King |
Base |
| 2008 |
Harley-Davidson |
FLHRSE4 Screamin Eagle Road King |
Base |
| 2013 |
Harley-Davidson |
FLHRSE5 CVO Road King |
Base |
| 2014 |
Harley-Davidson |
FLHRSE6 CVO Road King |
Base |
| 2002 |
Harley-Davidson |
FLHRSEI Screamin Eagle Road King |
Base |
| 2003 |
Harley-Davidson |
FLHRSEI2 Screamin Eagle Road King 2 |
Base |
| 2004-2006 |
Harley-Davidson |
FLHRSI Road King Custom |
Base |
| 2017-2020 |
Harley-Davidson |
FLHRXS Road King Special |
Base |
| 1993 |
Harley-Davidson |
FLHS Electra Glide Sport |
Base |
| 1995-2009,2020 |
Harley-Davidson |
FLHT Electra Glide Standard |
Base |
| 1993-2005,2007-2013 |
Harley-Davidson |
FLHTC Electra Glide Classic |
Base |
| 1996-2006 |
Harley-Davidson |
FLHTCI Electra Glide Classic |
Base |
| 2004 |
Harley-Davidson |
FLHTCSE Screamin Eagle Electra Glide |
Base |
| 2005 |
Harley-Davidson |
FLHTCSE2 Screamin Eagle Electra Glide 2 |
Base |
| 1993-1997,2007-2019 |
Harley-Davidson |
FLHTCU Electra Glide Ultra Classic |
Base |
| 1995-2006 |
Harley-Davidson |
FLHTCUI Electra Glide Ultra Classic |
Base |
| 2015-2016 |
Harley-Davidson |
FLHTCUL Electra Glide Ultra Classic Low |
Base |
| 2006 |
Harley-Davidson |
FLHTCUSE Screamin Eagle Ultra Classic Electra Glide |
Base |
| 2007 |
Harley-Davidson |
FLHTCUSE2 Screamin Eagle Ultra Classic Electra Glide |
Base |
| 2008 |
Harley-Davidson |
FLHTCUSE3 Screamin Eagle Ultra Classic Electra Glide |
Base |
| 2009 |
Harley-Davidson |
FLHTCUSE4 CVO Ultra Classic Electra Glide |
Base |
| 2010 |
Harley-Davidson |
FLHTCUSE5 CVO Ultra Classic Electra Glide |
Base |
| 2011 |
Harley-Davidson |
FLHTCUSE6 CVO Ultra Classic Electra Glide |
Base |
| 2012 |
Harley-Davidson |
FLHTCUSE7 CVO Ultra Classic Electra Glide |
Base |
| 2013 |
Harley-Davidson |
FLHTCUSE8 CVO Ultra Classic Electra Glide |
Base |
| 2003-2006 |
Harley-Davidson |
FLHTI Electra Glide Standard |
Base |
| 2010-2014 |
Harley-Davidson |
FLHTK Electra Glide Ultra Limited |
Base |
| 2015-2020 |
Harley-Davidson |
FLHTK Ultra Limited |
Base |
| 2015-2019 |
Harley-Davidson |
FLHTKL Ultra Limited Low |
Base |
| 2014-2020 |
Harley-Davidson |
FLHTKSE CVO Limited |
Base |
| 2006-2020 |
Harley-Davidson |
FLHX Street Glide |
Base |
| 2014-2020 |
Harley-Davidson |
FLHXS Street Glide Special |
Base |
| 2010,2015-2020 |
Harley-Davidson |
FLHXSE CVO Street Glide |
Base |
| 2011 |
Harley-Davidson |
FLHXSE2 CVO Street Glide |
Base |
| 2012 |
Harley-Davidson |
FLHXSE3 CVO Street Glide |
Base |
| 2001 |
Harley-Davidson |
FLSTC Heritage Softail Classic |
Base |
| 1993-1995 |
Harley-Davidson |
FLTCU Tour Glide Ultra Classic |
Base |
| 1996 |
Harley-Davidson |
FLTCUI Tour Glide Ultra Classic |
Base |
| 1998-2002,2007-2009 |
Harley-Davidson |
FLTR Road Glide |
Base |
| 1998-2006 |
Harley-Davidson |
FLTRI Road Glide |
Base |
| 2020 |
Harley-Davidson |
FLTRK Road Glide Limited |
Base |
| 2009 |
Harley-Davidson |
FLTRSE3 CVO Road Glide |
Base |
| 2000 |
Harley-Davidson |
FLTRSEI Screamin Eagle Road Glide |
Base |
| 2001 |
Harley-Davidson |
FLTRSEI2 Screamin Eagle Road Glide 2 |
Base |
| 2011-2013,2016-2019 |
Harley-Davidson |
FLTRU Road Glide Ultra |
Base |
| 2011,2015-2016 |
Harley-Davidson |
FLTRUSE CVO Road Glide Ultra |
Base |
| 2015-2020 |
Harley-Davidson |
FLTRX Road Glide |
Base |
| 2010-2013 |
Harley-Davidson |
FLTRX Road Glide Custom |
Base |
| 2015-2020 |
Harley-Davidson |
FLTRXS Road Glide Special |
Base |
| 2018-2019 |
Harley-Davidson |
FLTRXSE CVO Road Glide |
Base |
| 2012 |
Harley-Davidson |
FLTRXSE CVO Road Glide Custom |
Base |
| 2013 |
Harley-Davidson |
FLTRXSE2 CVO Road Glide Custom |
Base |
