The Injen Technology air intake system for Audi S4/S5 B9 models offers a premium upgrade featuring either a black or red large bore aluminum intake pipe. This kit includes a nano fiber washable air filter, a black silicone coupler, and all necessary components for a straightforward installation. Exp..

The Injen Technology air intake system for Audi S4/S5 B9 models offers a premium upgrade featuring either a black or red large bore aluminum intake pipe. This kit includes a nano fiber washable air filter, a black silicone coupler, and all necessary components for a straightforward installation. Exp..