Performance Air Intake | Aftermarket Cold Air Intake Audi Audi A4 B6 (02-2005) Performance Air Intake for Audi A4 Vehicles. You’ll breathe easier when your engine breathes better. With a performance intake manifold or cold air intake, engine power increases all the way through the rev band, every time you so much as Aftermarket Audi B6 A4 Intakes (2002-2005) - Modded Euros Aftermarket Audi B6 A4 Intakes (2002-2005) Have the itch to begin modifying your car? Installing a 02-05 A4 cold air intake is typically the first place any B6 owner starts. ModdedEuros offers a selection of CAI's from the top brands. Check them out below and be sure to let your engine breathe better.