APR 07-08 Audi RS4 Intake Filter (263mm x 211mm)

APR High Flow Intake Filters are a direct upgrade to your factory intake system! Typically your engine is equipped with a cheap, mass-produced and restrictive paper filter system that must be replaced several times in the life of the vehicle. The APR Filter uses a proprietary, high-flow, cotton-gauze filtration material that is washable and will likely outlive the vehicle itself! The filtration material was flow-bench optimized to provide maximum performance while also providing excellent filtration that will keep your engine running clean for hundreds of thousands of miles with normal maintenance. With multiple decades of creating and selling high-flow filters for hundreds of thousands of vehicles with our upgraded intake systems, we're confident our line of drop-in filters will be an excellent upgrade for our budget-minded consumers! 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

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