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 2007-2017 Audi L4 1.8/2.0L (A5 Quattro, Q5, A4, A5), 33-2945 : 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
Amazon.com: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
Amazon.com: K&N Engine Air Filter: Increase Power & Acceleration, Washable, Premium, Replacement Car Air Filter: Compatible with 2007-2017 Audi L4 1.8/2.0L (A5 Quattro, Q5, A4, A5), 33-2945 : Automotive
Amazon.com: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
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: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
Amazon.com: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
Felt Automotive Hardware at Lowes.com
Amazon.com: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
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 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 2007-2017 Audi L4 1.8/2.0L (A5 Quattro, Q5, A4, A5), 33-2945 : Automotive
Amazon.com: K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: Compatible with 2000-2012 MG/CHRYSLER (MG5, PT Cruiser), 33-2153 : Automotive
Amazon.com: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
Amazon.com: Replacement Cabin Air Filter for 2017 AUDI A4 L4 2.0L 1984cc 121 CID Car/Automotive - Activated Carbon, ACF-11179 : Automotive
Amazon.com: K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter: Compatible with 1996-2007 JAGUAR/DAIMLER (XK8, XK8-R, XKR, XJ8, XJR, V8 Super) , 33-2190 : Automotive
Amazon.com: Replacement Cabin Air Filter for 2017 AUDI A4 L4 2.0L 1984cc 121 CID Car/Automotive - Activated Carbon, ACF-11179 : Automotive
Amazon.com: Compatible with Audi A4 / A5 / Q5 Quattro 2.0T Reusable & Washable Replacement High Flow Drop-in Air Filter (Red) : Everything Else
Amazon.com: Air Filter intake System Short Ram + Heat Shield Stainless Steel Cover Compatible with A4 2.0L 2.0 : 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
