APR 02-09 Audi A4/A4 Quattro/04-09 Audi S4 (B6/B7) 1.8T/2.0T/3.0L/3.2L/4.2L Intake Filter - Red

Our drop-in filters are made for all engine types including gas, diesel, ethanol, or other fuels, and naturally aspirated, turbocharged, supercharged, and other hybrid configurations! In every scenario, our filter maximizes performance of the factory intake system. Expect sharper throttle response, a little more sound, and on turbocharged engines, less strain on the turbo with a reduction in turbo lag.

• Maximizes engine performance
• Flows more than stock
• Lower pressure drop than stock at every flow rate
• Sharpens response (Turbo/Throttle)
• High-flow, proprietary cotton-gauze material
• Washable and reusable for the life of the engine
• Slightly enhances engine sound
• Flow-bench optimized design
• Works at any stage of performance
• Compatible with the factory intake system
• Decades of success designing high-flow filters for high performance applications
• Does not negatively impact emissions

Vehicle Fitment: Fits Audi A4 02-09, A4 Quattro 02-09, RS4 07-08, S4 04-09​

Part Number Cross References: AC Delco A1411C, Audi 06C133842, Audi 06C133843, Audi 079133843A, BMC 27901, BMC FB27901, Champ Labs. AF3593, Fram CA10573, K&N 33-2209, Luber-Finer AF3593, Mann-Hummel C271921, MicroGard MGA42972, Mobil AF3593, Napa 2295, Premium Guard PA5457, Purepro A5457, Purolator A47039, Repco RAF301, Ryco A1593, Service Champ AF5457, Simota OA001, STP SA9409, Valvoline VA325, Warner WAF3593, Wesfil WA5021, WIX 42972, WIX 49842