Audi S4 Air Filter

K&N HIGH FLOW DIRECT FIT AIR FILTER, RED, SOLD INDIVIDUALLY -- 50-state legal; Provides 1 to 4 h.p. power gain; 96 to 99 percent filtration efficiency; 0.75 in. height, 9.875 in. outside length, 8.25 in. outside width; Oiled element; Panel style; Made of ...

K&N HIGH FLOW DIRECT FIT AIR FILTER, RED, SOLD INDIVIDUALLY -- 50-state legal; Provides 1 to 4 h.p. power gain; 96 to 99 percent filtration efficiency; 1.125 in. height, 10.313 in. outside length, 8.25 in. outside width; Oiled element; Panel style; Made o...

K&N HIGH FLOW AIR FILTER, PANEL STYLE -- Height 1.125, Outside Length 12.063, Outside Width 7.125, A High Performance Air Filter Designed to Increase Horsepower and Acceleration, Offers High Air Flow With Excellent Filtration, Washable and Reusable, Fits ...

K&N HIGH FLOW AIR FILTER, ROUND TAPERED -- OD 7.5, Flange Length 1, Flange ID 6, A High Performance Washable And Reusable Filter That Lasts Longer, Made With Ultra-Strong Molded Pliable Rubber Flanges Which Absorbs Vibration, Allows Secure Attachment And ...

CABIN AIR FILTER -- A High Quality, Direct Fit OE Replacement For Cabin Air Filter...

CABIN AIR FILTER -- A high quality, direct fit OE replacement cabin air filter....

Activated Charcoal...

Particulate Filter...

Particulate Filter...

FRAM EXTRA LIFE AIR FILTER, FLEXIBLE PANEL -- 2.19" Height, 8.39" Width, 9.88" Length, Protects The Engine And Provides More Airflow For Improved Performance, Helps Prevent Damaging Particles From Entering The Engine And Causing Increased Engine Wear, Las...

FRAM EXTRA LIFE AIR FILTER, FLEXIBLE PANEL -- 2.27" Height, 7.2" Width, 12.2" Length, Protects The Engine And Provides More Airflow For Improved Performance, Helps Prevent Damaging Particles From Entering The Engine And Causing Increased Engine Wear, Last...

FRAM EXTRA LIFE AIR FILTER, FLEXIBLE PANEL -- 2.27" Height, 7.2" Width, 12.2" Length, Protects The Engine And Provides More Airflow For Improved Performance, Helps Prevent Damaging Particles From Entering The Engine And Causing Increased Engine Wear, Last...

FRAM EXTRA LIFE AIR FILTER, FLEXIBLE PANEL -- 2.19" Height, 8.39" Width, 9.88" Length, Protects The Engine And Provides More Airflow For Improved Performance, Helps Prevent Damaging Particles From Entering The Engine And Causing Increased Engine Wear, Las...