K&N Fits Audi A4 1.8L Drop In Air Filter | eBay
K&N 09-10 Audi A4 2.0L Typhoon Air Intake – Hobby Shop Garage
Air Filter, Performance (K&N) for B8 A4-A5-S4-S5 or Q5-SQ5 w/ 3.0T, 3.2L, and 4.2L
K&N 69-9508T Performance Air Intake System
K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: 2015-2018 AUDI (A4, A4 Quattro, A5, A5 Quattro, A5 Sportback, Q5 II), E-0648" - Walmart.com
K&N Air Intake for 2001-2007 Audi A4 [B6] 1.9L & 2.5L
Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Premium, Replacement Car Air Filter: Compatible with 2015-2018 AUDI (A4, Quattro, A5, Sportback, Q5 II, RS4, RS5, S4, S5, FAW A4),E-0646 :
KandN | Shop for KandN Filters and Cold Air Intakes Audi a4 b8 (2009/2016) 2.0t quattro Parts – UroTuning
Amazon.com: K&N Cold Air Intake Kit: Increase Acceleration & Engine Growl, Guaranteed to Increase Horsepower: Compatible with 1.8L, L4, 1995-2001 AUDI/VOLKSWAGEN (A6, A4, A4 Quattro, Passat), 57-0282 : Automotive
Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Premium, Replacement Car Air Filter: Compatible with 2007-2017 Audi V6/V8 (Q5, S5, SQ5, A5, A5 Quattro, S4, A4 Quattro) E-1987 : Automotive
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 Premium Oil Filter: Designed to Protect your Engine: Fits Select 2005-2019 AUDI/VOLKSWAGEN/PORSCHE (Q5, Q7, S5, SQ5, S4, A4, A5, A6, A7, A8, Quattro, Cabriolet, Touareg, Cayenne), HP-7015 - Walmart.com
K&N Air Filter | Audi B8 A4 | A5 | Q5 2.0T | 33-2945 – UroTuning
K&N E-0648 Replacement Air Filter
K&N Air Filter Audi A4 1.6L/1.8L/1.9L/2.0L L4 / 2.4L/2.5L/2.7L/3.0L V6 – Redline360
Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Replacement Car Air Filter: Compatible with 2000-2013 Audi/Seat (A4 Cabriolet, S4, RS4, A4 Quattro Cariolet, Quattro, Exeo), 33-2209 : Automotive