Arnotts new adjustable Air Suspension System for the compatible with Harley-Davidson SoftailR has been custom designed for the Softail frame to provide the rider with superior control, ride comfort and height adjustability. The kit, featuring Arnotts TruAIR technology, includes. a rugged air spring bladder and is not an air cylinder or air-assisted unit. Arnott includes a powerful compressor and black anodized cover which attaches to the regulator rectifier to hide and protect the compressor..This item fits the following vehicle applications:compatible with Harley Davidson FLS Softail Slim 2012-2017compatible with Harley Davidson FLST Heritage Softail 2006compatible with Harley Davidson FLSTC Heritage Softail Classic 2001-2017compatible with Harley Davidson FLSTCI Heritage Softail Classic 2001-2006compatible with Harley Davidson FLSTF Fat Boy 2001-2017compatible with Harley Davidson FLSTFB Fat Boy Lo 2010-2016compatible with Harley Davidson FLSTFI Fat Boy 2001-2006compatible with Harley Davidson FLSTI Heritage Softail 2006compatible with Harley Davidson FLSTN Softail Deluxe 2005-2017compatible with Harley Davidson FLSTNI Softail Deluxe 2005-2006compatible with Harley Davidson FLSTS Heritage Springer 2001-2003compatible with Harley Davidson FLSTSB Cross Bones 2008-2011compatible with Harley Davidson FLSTSC Softail Springer Classic 2005-2007compatible with Harley Davidson FLSTSCI Softail Springer Classic 2005-2006compatible with Harley Davidson FXS Blackline 2011-2013compatible with Harley Davidson FXSB Breakout 2013-2017compatible with Harley Davidson FXST Softail Standard 2001-2007compatible with Harley Davidson FXSTB Night Train 2001-2009compatible with Harley Davidson FXSTBI Night Train 2001-2006compatible with Harley Davidson FXSTC Softail Custom 2007-2010compatible with Harley Davidson FXSTD Softail Deuce 2001-2007compatible with Harley Davidson FXSTDI Softail Deu