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