Racingline High-Flow Air Filter for Audi S4/S5/RS4/RS5 (B9).
Audi's V6 TFSI turbocharged engines in the current B9 S4/S5 and RS4/RS5 will really benefit from our TriFoam™ High Flow Intake Filter. Using the exact same filter material as our intake systems, it’s a simple-fit replacement for your factory paper filter. Expect a worthwhile boost to engine efficiency as a perfect complement to either a standard engine or those running uprated power.