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...

AEM COLD AIR INDUCTION SYSTEM -- 49-state legal; Legal in California only for racing vehicles which may never be used upon a highway; Up to 99.52 percent filtration efficiency; Includes silver intake tube, grey synthetic air filter, heat shield, and a com...

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...

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 ...

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; 6 in. base outside diameter, 3 in. flange inside diameter, 1.5 in. flange length, 9.25 in. height, 5.125 in. top outside diameter; Non-woven polyester-based ...

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...

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...

AFE PRO DRY S AIR FILTER -- Uses A Revolutionary Two-Ply Synthetic, Oil Free Material That Is Functionally Superior To Traditional Paper Media And Single-Ply Synthetic, Easy To Service, Increase Airflow Providing Improved Throttle Response, Horsepower, To...

AEM SHORT NECK DRYFLOW PERFORMANCE AIR FILTER, GREY -- Up to 99.52 percent filtration efficiency; 5 in. height, 7.5 in. base outside diameter, 6 in. flange inside diameter, 0 in. flange length, 5.125 in. top outside diameter; Non-woven polyester-based med...

AFE PRO DRY S AIR FILTER -- Uses A Revolutionary Two-Ply Synthetic, Oil Free Material That Is Functionally Superior To Traditional Paper Media And Single-Ply Synthetic, Easy To Service, Increase Airflow Providing Improved Throttle Response, Horsepower, To...

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-...