Audi A4 Quattro 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...

K&N 57I SERIES PERFORMANCE INDUCTION KIT, GENERATION I -- Designed To Increase Power And Acceleration Throughout The RPM Range, Replaces OEM Filter And Air Box, Works With Original Equipment Manufacturer Computer System, Features An Extra Surface Area Tha...

K&N 57I SERIES APOLLO COLD AIR INDUCTION SYSTEM -- Reduces Heat Build-Up And Feeds Cool Air Into Your Engine, Resulting In Improved Volumetric Efficiency And Increased Power Gains, Incorporate A Washable And Reusable K&N High-Flow Air Filter Within A Prot...

K&N 57I SERIES PERFORMANCE INDUCTION KIT, GENERATION I -- Designed To Increase Power And Acceleration Throughout The RPM Range, Replaces OEM Filter And Air Box, Works With Original Equipment Manufacturer Computer System, Features An Extra Surface Area Tha...

K&N 57I SERIES GENERATION II COLD AIR INTAKE SYSTEM -- Street legal in most states but not legal in California; 96 to 99 percent filtration efficiency; Includes black roto molded intake tube, red air filter, heat shield, and all the necessary hardware for...

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 -- 50-state legal; Provides 1 to 4 h.p. power gain; 96 to 99 percent filtration efficiency; Oiled element; Unique style; Made of multiple interwoven layers of surgical cotton gauze; Increases horsepower and accele...

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...