Carbon Fiber Rear Diffuser for 2013-16 Audi S4/A4 [B8.5] by DEVAL D28244
Sport Rear Bumper Diffuser for Audi A4 B8 Sedan Avant 2008-2011 | eBay
Amazon.com: JC SPORTLINE Carbon Fiber Rear Diffuser for Audi A4 B8 Standard Sedan 2009-2012 Rear Bumper Diffuser Lip Spoiler Factory Outlet (Style A) : Automotive
Sport Rear Bumper Diffuser for Audi A4 B8 Sedan Avant 2008-2011 | eBay
Amazon.com: MCARCAR KIT Rear Diffuser fits Audi A4 B8 B8.5 Sedan Facelift 2013-2016 Factory Outlet Carbon Fiber CF Lower Bumper Lip Spoiler Body Kit(Not for Sline & S4) : Everything Else
Rieger 00055506 Audi B8 B81 A4 Rear Diffuser 1 – ML Performance
Carbon Fiber Rear Diffuser by AWE for 2009-2012 Audi A4 [B8] Dual/Quad Exhaust Converison