Air Filter, Performance (K&N) for B8 A4-A5-S4-S5 or Q5-SQ5 w/ 3.0T, 3.2L, and 4.2L
K&N 09-10 Audi A4 2.0L Typhoon Air Intake - Fuel Injector Connection
Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Premium, Replacement Car Air Filter: Compatible with 2015-2018 AUDI (A4, A5, A5 Sportback), E-0647 : Automotive
K&N Performance Air Filter For Audi B6/B7 - 33-2209 - 75000534 - USP Motorsport
K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: 2010-2015 AUDI (A4, A5, RS4, RS5), 33-3031 - Walmart.com
Replacement Air Filter
K&N Air Filter Audi A4 1.8L L4 / 2.0L (07-16) Performance Replacement – Redline360
Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower up to 14HP: Compatible with 2.0L, L4, 2009-2013 Audi (A4, A4 Cabriolet, A4 Quattro), 69-9505T : Automotive
Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower up to 15HP: Compatible with 2.0L, L4, 2014-2015 Audi (A4, A5, A6), 69-9508T : Automotive
K&N Engineering K&N Air Filter For Audi A4 / Rs4 / S4; Seat Exeo - 33-2209
K&N 2014 Audi A4 2.0L Turbo Typhoon Air Intake – Extreme Performance & Offroad
Audi Air Filter (K&N) for B5 A4/S4, C5 A6/Allroad
Audi, VW K&N Performance Air Filter (A4 A6 allroad S4 S6 Passat B5 C5) 058133843 by KN Engineering | Europa Parts
K&N Air Filter For Audi A5 1.8 / 2.0 / 2.0 TDI Inc Quattro 2009 - 2015 - 33-2945 | eBay
2001 Audi A4 - K&N Filter & Forge 007 DV Sound Test - YouTube
K&N Drop-In Panel Filter, Audi B6, B7 1.8T, 2.0T, V6
K&N Audi A4 1.8L Drop In Air Filter – JP3 Motorsports