The HD-0808 air filter fits 2008 and 2009 Harley Davidson^® Dyna Models with the upgraded Screamin’ Eagle^® Pro air cleaner kit. It will fit directly into your Harley Davidson’s^® Screamin’ Eagle^® Air Filter Assembly without any cutting or fitting.

• Unique Tear Drop Metal Top Plate with centered 5/16" NC Weld Nut to attach cover
• Three-hole-drilled to fit standard mounting pattern for Twin-Cam Screamin’ Eagle backplate
• Unique Tear Drop Molded Rubber Base

The HD-0900 air filter fits 2004, 2005, 2006, 2007, 2008 and 2009 Harley Davidson^® Sportster 883 and 1200's with the upgraded Screamin’ Eagle^® Pro air cleaner kit. It will fit directly into your Harley Davidson’s^® Screamin’ Eagle^® Air Filter Assembly without any cutting or fitting.

• 9 3/8"L x 6"W Oval x 1 7/8"H
• Top Plate is drilled to fit standard mounting pattern for Sportster Screamin' Eagle Air Cleaner

• 5-1/2" Diameter Metal Top Plate with centered 5/16 NC Weld Nut to attach cover
• Three-hole-drilled to fit standard mounting pattern for Twin-Cam Screamin' Eagle backplate
• 6" Diameter Molded Rubber Base

• 5-1/2" Diameter Metal Top Plate has centered 5/16" NC Weld Nut to attach cover
• Top Plate is Three-hole-drilled to fit standard mounting pattern for Twin-Cam air cleaners
• 6-1/4" Diameter Molded Rubber Base

• 7" Diameter Metal Top has centered 5/16" NC Weld Nut to attach cover
• Top Plate is Three-hole-drilled to fit standard mounting pattern for Twin-Cam air cleaners
• 6" Diameter Molded Rubber Base
• Must supply own mounting hardware
• Fits Twin Cam Screamin' Eagle backplate only

• 7" Diameter Metal Top has centered 5/16" NC Weld Nut to attach cover
• Top Plate is Three-hole-drilled to fit standard mounting pattern for Twin-Cam air cleaners
• 7" Diameter Molded Rubber Base
• Requires stock mounting spacers

K&N's Sportster RK Series Air Cleaner will get more horsepower from your Harley Davidson^® Sportster motorcycle. This complete assembly fits inside the stock air cleaner cover, and provides a significant increase in airflow.

• Developed around an Original K&N High-Flow Air Filter boosting performance and filtration
• Internal breathers attach to backing plate, replacing external OE breathers
• Dyno-tuned velocity stack optimizes airflow to engine
• Powder coated aluminum backing plate provides solid mounting surface

The latest addition to K&N's RK Series was developed to get more horsepower from your Twin Cam^® Harley-Davidson^® engine. Built around the legendary K&N High-Flow Air Filter, the new RK Series assembly includes an innovative powder coated billet aluminum backplate that eliminates external breathers and features a built-in, dyno-tuned velocity stack. The result is a significant airflow increase to the engine without sacrificing filtration. This RK Series assembly retains a factory appearance by utilizing the stock air cleaner cover. RK-3909 is Now 50 State Legal On 2001-2006 Fuel Injected Models.

• Powder Coated Billet Aluminum Backplate Eliminates External Breathers
• Features a Built-In Dyno-Tuned Velocity Stack
• Retains Factory Air Cleaner Cover
• Includes Washable/Reusable K&N High-Flow Air Filter
• Does Not Fit Twin Cam^® Engines with Magneti Marelli Fuel Injection System

• Oversized cast-aluminum Backing Plate with internal-run breather system
• Features a Built-In Dyno-Tuned Velocity Stack
• Retains Factory Air Cleaner Cover
• Includes Washable/Reusable K&N High-Flow Air Filter

• Oversized cast-aluminum Backing Plate with internal-run breather system
• Features a Built-In Dyno-Tuned Velocity Stack
• Retains Factory Air Cleaner Cover
• Includes Washable/Reusable K&N High-Flow Air Filter

RK series air intakes are street legal in most states. Some of these parts are not legal for use on certain vehicles in California, or other states adopting California emission standards. Use our online search by part for CARB status of the part on specific vehicles.

A remarkable combination of performance and style, K&N air cleaner assemblies custom designed for your Harley-Davidson^®.  Machined from billet aluminum, luster polished, then chrome plated to complement your show bike.

Two unique styles (shapes); Three unique finishes: Mirror, Ball Grooved or Flamed

These K&N custom air cleaners fit all "EVO" model Big-Twin and Sportster's with stock carburetors.  Each K&N air cleaner comes complete and ready to use, including mounting bracket kit, nothing else to buy.  Not legal for use in California, or other states with similar emissions control regulations. See product applications for specifications regarding emissions standards and CARB regulations.

• Machined from billet aluminum, luster polished and chrome-plated
• Oversized, original K&N High-Flow Air Filter
• Powder-coated billet aluminum backing plate
• Includes breather tubes and all necessary mounting hardware
• Available in round or teardrop shapes and three unique finishes
• Fits all EVO model Big Twin and 1200 Sportster's with stock carburetors