Audi S4 Air Filter

"K&N HIGH FLOW REPLACEMENT AIR FILTER, PANEL STYLE -- 0.75 in. Height, 9.875 in. Outside Length, 8.25 in. Outside Width, Adds 1-4 hp Power Gain, 96%-99% Filtration Efficiency Rate, This Air Filter Is Designed To Increase Horsepower And Acceleration While ...

"K&N HIGH FLOW REPLACEMENT AIR FILTER, PANEL STYLE -- 1.125 in. Height, 10.313 in. Outside Length, 8.25 in. Outside Width, Adds 1-4 hp Power Gain, 96%-99% Filtration Efficiency Rate, This Air Filter Is Designed To Increase Horsepower And Acceleration Whil...

"K&N HIGH FLOW REPLACEMENT 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 Re...

"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 Th...

"HIGH PERFORMANCE AIR FILTER, PANEL TYPE -- A High Performance OE Replacement Panel Air Filter Designed To Improve Fuel Efficiency, Power And Filtration, Cleanable And Reusable Air Filter, Will Last The Life Of The Vehicle"...

"HASTINGS AIR FILTER -- OEM Direct Fit Replacement Panel Air Filter Element, 10 x 8 13/32 x 2 1/4, Replaces BMW 13711736675; Volkswagen 58133843; Baldwin PA4091"...

"BECK-ARNLEY AIR FILTER -- A High Quality, Direct-Fit OEM Replacement Air Filter"...

"BECK-ARNLEY AIR FILTER -- A High Quality, Direct-Fit OEM Replacement Air Filter"...

"BECK-ARNLEY AIR FILTER -- A High Quality, Direct-Fit OEM Replacement Air Filter"...

"AC DELCO, AIR FILTER -- OEM Design Air Filter, A High Quality Direct Replacement Part Providing Exact Fit For Easy Installation And Reliable Operation, Direct Replacement Part For OE Number 25177055"...

"AC DELCO, AIR FILTER -- OEM Design Air Filter, A High Quality Direct Replacement Part Providing Exact Fit For Easy Installation And Reliable Operation"...

"TRUE FLOW PREMIUM FOAM PERFORMANCE AIR FILTER -- Reusable Direct OE Replacement, Offers Superior Filtration, True Flow Developed An Air Filter Using Fully Reticulated Foam Cells And Specially Formulated Tackifier That Create An Impossible Journey For Dir...

"TRUEFLOW UNIVERSAL AIR FILTER - Reusable UNIVERSAL Filter, 14 x 3 Round, Offers Superior Filtration, Increased Air Flow Resulting In Better Protection And Increased Performance, 50 States Legal, Lifetime Warranty"...

"TRUE FLOW PREMIUM FOAM PERFORMANCE AIR FILTER -- Reusable Direct OE Replacement, Offers Superior Filtration, True Flow Developed An Air Filter Using Fully Reticulated Foam Cells And Specially Formulated Tackifier That Create An Impossible Journey For Dir...

"TRUEFLOW UNIVERSAL AIR FILTER - Reusable UNIVERSAL Filter, 3-1/2, Offers Superior Filtration, Increased Air Flow Resulting In Better Protection And Increased Performance, 50 States Legal, Lifetime Warranty"...

"GREEN HIGH PERFORMANCE REPLACEMENT AIR FILTER -- Engineered To Maximize Air Flow While Trapping Harmful Dirt Particles, The Result Of This Technology Is Increased Horsepower, Improved Throttle Response, Better Fuel Mileage And Greater Torque Throughout Y...

"AFE PRO DRY S OE REPLACEMENT 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...

"AFE OE DIRECT FIT REPLACEMENT FILTER -- High Performance OE Replacement Air Filter, Made From 100% Polyurethane Construction For Fuel Mileage And Throttle Response Improvement, Features Pliable Progressive Polyurethane Seal, Washable/Reusable Cotton Gauz...

"AFE OE DIRECT FIT REPLACEMENT FILTER -- High Performance OE Replacement Air Filter, Made From 100% Polyurethane Construction For Fuel Mileage And Throttle Response Improvement, Features Pliable Progressive Polyurethane Seal, Washable/Reusable Cotton Gauz...

"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, La...

"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, Las...

"INJEN HYDROSHIELD WATER REPELLANT PRE-FILTER, RED -- This Race Proven Pre-Filter Is Made From Highly Durable Polyester Material That Provides Added Protection During Unsure Moments, Features Uniform Micron Opening That Allows The Filtering Of Debris By 0...

"INJEN HYDROSHIELD WATER REPELLANT PRE-FILTER, BLACK -- This Race Proven Pre-Filter Is Made From Highly Durable Polyester Material That Provides Added Protection, Features Uniform Micron Opening That Allows The Filtering Of Debris By 0.005 in. Or Larger, ...

"GREEN HIGH PERFORMANCE AIR FILTER RECHARGE KIT -- Cleanses And Restores All Air Filters, Kit Includes 12oz Bottle Of Green Cleaning And Degreaser Solution And 8oz Bottle Of Green Filter Oil"...

"INJEN HIGH PERFORMANCE AIR FILTER -- 3.00 in. Mouth Diameter, 5 in. Base, 5 in. Tall, 4 in. Top, 40-Pleat, Features Black Urethane Body With Red Filter Media, Provides Excellent Air Flow And Filtration, Washable And Reusable, With Injen's Limited Lifetim...

"INJEN HIGH PERFORMANCE AIR FILTER -- 2.75 in. Mouth Diameter, 6 in. Base, 5 in. Tall, 5 in. Top, Features Black Urethane Body With Red Filter Media, Provides Excellent Air Flow And Filtration, Washable And Reusable, With Injen's Limited Lifetime Warranty...

"INJEN HIGH PERFORMANCE AIR FILTER -- 3.50 in. Mouth Diameter, 6.75 in. Base, 5 in. Tall, 5 in. Top, Features Black Urethane Body With Red Filter Media, Provides Excellent Air Flow And Filtration, Washable And Reusable, With Injen's Limited Lifetime Warra...

"INJEN HIGH PERFORMANCE AIR FILTER -- 2.50 in. Mouth Diameter, 6 in. Base, 5 in. Tall, 5 in. Top, Features Black Urethane Body With Red Filter Media, Provides Excellent Air Flow And Filtration, Washable And Reusable, With Injen's Limited Lifetime Warranty...

"INJEN HIGH PERFORMANCE AIR FILTER -- 3 in. Mouth Diameter, 6 in. Base, 5 in. Tall, 5 in. Top, Features Black Urethane Body With Red Filter Media, Provides Excellent Air Flow And Filtration, Washable And Reusable, With Injen's Limited Lifetime Warranty"...

INJEN HIGH PERFORMANCE TAPERED AIR FILTER -- Black Urethane Body With Red Filter Media...

"INJEN HIGH PERFORMANCE AIR FILTER, BLACK -- 6 in. Base, 5 in. Tall, 4 in. Top, 45 Pleats, This Is The First Urethane Filter With Built In Velocity Stack For Added Performance, Features Cotton Gauze Element That Allows Cleaning And Durability For 1000's O...

"INJEN POWER-FLOW DIAMOND PLATE HEAT SHIELD, CLEAR COATED -- A Universal Heat Shield That Adds Extra Layer Of Protection From Under Hood Heat, Fits 3.00 in. And 3.50 in. Air Filter, With Injen's Limited Lifetime Warranty"...

"INJEN AIR FILTER HEAT SHIELD, ALUMINUM, UNIVERSAL, FITS 2 1/2 MOUTH -- Add An Extra Layer Of Protection From Under Hood Heat, Attractive Shield Insulates And Protects"...

"INJEN WATER REPELLANT PRE-FILTER BLACK -- Injen's Hydroshield Pre-Filters Repel Water And Debris .005 Or Larger, But Still Allows Maximum Air Flow, NOTE: The Pre Filter Is Water Repellant NOT Water Proof"...

"INJEN WATER REPELLANT PRE-FILTER BLUE -- Injen's Hydroshield Pre-Filters Repel Water And Debris .005 Or Larger, But Still Allows Maximum Air Flow, NOTE: The Pre Filter Is Water Repellant NOT Water Proof"...

"INJEN WATER REPELLANT PRE-FILTER BLACK -- Injen's Hydroshield Pre-Filters Repel Water And Debris .005 Or Larger, But Still Allows Maximum Air Flow, NOTE: The Pre Filter Is Water Repellant NOT Water Proof"...

"INJEN WATER REPELLANT PRE-FILTER BLUE -- Injen's Hydroshield Pre-Filters Repel Water And Debris .005 Or Larger, But Still Allows Maximum Air Flow, NOTE: The Pre Filter Is Water Repellant NOT Water Proof"...

"INJEN WATER REPELLANT PRE-FILTER RED -- Injen's Hydroshield Pre-Filters Repel Water And Debris .005 Or Larger, But Still Allows Maximum Air Flow, NOTE: The Pre Filter Is Water Repellant NOT Water Proof"...

"INJEN WATER REPELLANT PRE-FILTER RED -- Injen's Hydroshield Pre-Filters Repel Water And Debris .005 Or Larger, But Still Allows Maximum Air Flow, NOTE: The Pre Filter Is Water Repellant NOT Water Proof"...

"K&N AIR FILTER RECHARGER SERVICE KIT, 8 OUNCE OIL SQUEEZE BOTTLE AND 12 OUNCE FILTER CLEANER -- For Use On K&N Filters Only, Six-Step Maintenance System Designed To Recharge Your K&N Air Filter, Restores Air Flow Efficiency"...

"K&N AIR FILTER RECHARGER SERVICE KIT, AEROSOL SPRAY CAN -- For Use On K&N Filters Only, Six-Step Maintenance System Designed To Recharge Your K&N Air Filter, Restores Air Flow Efficiency"...