Audi A4 Cold Air Intake

K&N 57I SERIES GENERATION I PERFORMANCE INDUCTION KIT -- Provides additional power up to 30 h.p.; 96 to 99 percent filtration efficiency; Includes black intake tube and red air filter with adapter; High-flow intake kit; Features an intake tube made of spe...

K&N 57I SERIES GENERATION I PERFORMANCE INDUCTION KIT -- Street legal in most states but not legal in California; Provides additional power up to 30 h.p.; 96 to 99 percent filtration efficiency; Includes black intake tube and red air filter with adapter; ...

K&N 57I SERIES GENERATION I PERFORMANCE INDUCTION KIT -- 96%-99% Filtration Efficiency Rate, This Intake Kit Is Designed To Increase Your Vehicles Power And Acceleration Throughout The RPM Range, It Replaces Your Restrictive OE Air Filter And Box, Works W...

K&N 57I SERIES GENERATION I PERFORMANCE INDUCTION KIT -- 96%-99% Filtration Efficiency Rate, This Intake Kit Is Designed To Increase Your Vehicles Power And Acceleration Throughout The RPM Range, It Replaces Your Restrictive OE Air Filter And Box, Works W...

AFE MAGNUM FORCE STAGE 2 CX COLD AIR INTAKE SYSTEM -- Provides additional power up to 12 h.p. and 20 lb.-ft. of torque; Increases airflow up to 75 percent; 98.6 percent filtration efficiency; up to 550 CFM; Includes Pro 5R Air Filter with 3.75 in. flange ...

AFE STAGE 1 CLASSIC (Cx) COLD AIR INTAKE SYSTEM, PRO DRY S AIR FILTER -- Bold, Aggressive Performance In A Simple Package, Retains Stock Intake Tube, Includes A 360%XBA Radial Air Filter, Provides A Throaty Performance Sound, Easy Installation, Uses A Rev...

K&N HIGH FLOW COLD AIR INTAKE FILTER, RED -- Racing use only; Not applicable nor intended for use on emission controlled street or highway vehicles; 96 to 99 percent filtration efficiency; 4.49 in. height, 5.43 in. base outside diameter, 3.94 in. flange i...

AEM SHORT NECK DRYFLOW PERFORMANCE AIR FILTER, GREY -- Up to 99.52 percent filtration efficiency; 5 in. height, 5.5 in. flange inside diameter; Non-woven polyester-based media; Dry element; Conical style; Features a light mineral-reinforced plastic cage t...

AFE REPLACEMENT AIR INTAKE FILTER, WITH PRO-GUARD 7 MEDIA FILTER -- A Washable, Reusable High Flow Filter, Features 7-Ply Progressively Finer Mesh Cotton Gauze For Better Filtration, Soft Pliable Flange With Progressive Bump Seal, Polyurethane Constructio...

AFE REPLACEMENT AIR INTAKE FILTER -- A Washable, Reusable High Flow Filter, Features 5-Ply Progressively Finer Mesh Cotton Gauze For Better Airflow, Soft Pliable Flange With Progressive Bump Seal, Polyurethane Construction That Is Resistant To Oils And Ch...

AEM SHORT NECK DRYFLOW PERFORMANCE AIR FILTER, GREY -- Up to 99.52 percent filtration efficiency; 8.938 in. height, 6 in. base outside diameter, 3.5 in. flange inside diameter, 1.375 in. flange length, 5.125 in. top outside diameter; Non-woven polyester-b...

AEM SHORT NECK DRYFLOW PERFORMANCE AIR FILTER, GREY -- Up to 99.52 percent filtration efficiency; 6 in. base outside diameter, 2.5 in. flange inside diameter, 1.5 in. flange length, 5.125 in. height, 5.125 in. top outside diameter; Non-woven polyester-bas...

AFE REPLACEMENT AIR INTAKE FILTER, WITH PRO-GUARD 7 MEDIA FILTER -- A Washable, Reusable High Flow Filter, Features 7-Ply Progressively Finer Mesh Cotton Gauze For Better Filtration, Soft Pliable Flange With Progressive Bump Seal, Polyurethane Constructio...

AEM SHORT NECK DRYFLOW PERFORMANCE AIR FILTER, GREY -- Up to 99.52 percent filtration efficiency; 5.125 in. height, 6.5 in. base outside diameter, 4.5 in. flange inside diameter, 1 in. flange length, 5.125 in. top outside diameter; Non-woven polyester-bas...

AEM SHORT NECK DRYFLOW PERFORMANCE AIR FILTER, GREY -- Up to 99.52 percent filtration efficiency; 9.125 in. height, 6 in. base outside diameter, 2.75 in. flange inside diameter, 1.563 in. flange length, 5.125 in. top outside diameter; Non-woven polyester-...