Attitude Inc's Billet Aluminum Air Cleaner Assembley kit features a Black Machined Billet Front Plate with an Exposed filter design that enhance air flow. Backing plate promotes smooth airflow into carburetor/throttle body . With Built-in internal crank case breathers and High Voloume Air Filter. Deep Cut Inverted Air Cleaner Filter Kit from Attitude Inc .The body of the air cleaner assembly is CNC machined from forged billet aluminum with an exposed design with an inverted top that serves as a velocity stock to increase air flow. The forged billet aluminum backing plate shares the Big Sucker design with hidden breather technology and a radius air inlet for smooth air flow. The hidden breathers use o-rings at the heads, and terminate at the throttle body to create a closed-loop system. The performance air filter that is included with this kit filters air from every angle with its 360 degrees of pleated medium. CNC machined from forged billet aluminum No external hoses or hardware needed Black stainless steel jacketed inverted filters feature an inverted pleated top and 360 ° of pleated sides to pull in filtered air from every angle Performance filters features a black synthetic filter element wrapped in a stainless steel jacket Filter is water resistant eliminating the need for a rain sock Fittment: Dyna Defender FXDP : 2001–2004 Dyna Fat Bob CVO FXDFSE : 2009 Dyna Fat Bob CVO FXDFSE2 : 2010 Dyna Fat Bob FXDF : 2008–2017 Dyna Low Rider Convertible FXDS-CONV : 1999–2000 Dyna Low Rider EFI FXDLI : 2004–2006 Dyna Low Rider FXDL : 1999–2005, 2007–2017 Dyna Street Bob EFI FXDBI : 2006 Dyna Street Bob FXDB : 2007–2017 Dyna Street Bob FXDBB : 2015–2016 Dyna Street Bob FXDBP : 2013–2016 Dyna Super Glide 35th Anniversary EFI FXDI35 : 2006 Dyna Super Glide Custom Anniversary FXDC : 2013 Dyna Super Glide Custom EFI FXDCI : 2005–2006 Dyna Super Glide Custom FXDC : 2005, 2007–2014 Dyna Super Glide CVO FXDSE : 2007 Dyna Super Glide CVO FXDSE2 : 2008 Dyna Super Glide EFI FXDI : 2004–2006 Dyna Super Glide FXD : 1999–2005, 2007–2010 Dyna Super Glide Sport EFI FXDXI : 2004–2005 Dyna Super Glide Sport FXDX : 2000–2005 Dyna Super Glide T-Sport FXDXT : 2001–2003 Dyna Switchback FLD : 2012–2016 Dyna Wide Glide CVO FXDWG2 : 2001 Dyna Wide Glide CVO FXDWG3 : 2002 Dyna Wide Glide EFI FXDWGI : 2004–2006 Dyna Wide Glide FXDWG : 1999–2005, 2007–2008, 2010–2017 Softail Blackline FXS : 2011–2013 Softail Breakout FXSB : 2013–2015 Softail Convertible CVO FLSTSE : 2010 Softail Cross Bones FLSTSB : 2008–2011 Softail Custom FXSTC : 2007–2010 Softail Deluxe EFI FLSTNI : 2005–2006 Softail Deluxe FLSTN : 2005–2015 Softail Deuce CVO FXSTDSE : 2003 Softail Deuce CVO FXSTDSE2 : 2004 Softail Deuce EFI FXSTDI : 2001–2006