The Audi A5, S5, and RS5 B9 platform is one of the most popular on our site — consistently among the top viewed products and most searched models. The coupe and sportback body styles both respond beautifully to carbon fiber upgrades. Here’s what B9 owners are building in 2026.
1. LCI-Style Taillights
The LCI-style taillights for the Audi B9 RS5/S5/A5 are one of our most visited products month after month. They give your car a facelift-level refresh — sequential turn signals, smoked or clear lens options, and plug-and-play installation. One of the highest-impact upgrades available for the B9 platform.
2. PSM-Style Carbon Fiber Trunk Spoiler
The PSM-style trunk spoiler is the most searched exterior upgrade for the A5/S5/RS5. Available for both B9 and B9.5 chassis, it adds a high-kick profile that transforms the rear of the coupe or sportback. Direct OEM fitment, no drilling required.
3. Carbon Fiber Front Lip
A carbon fiber front lip sharpens the front fascia of the B9 and adds front-end downforce. Available for S-Line, S5, and RS5 bumpers — each with precise OEM fitment and a gloss or matte finish.
4. Rear Diffuser
A carbon fiber rear diffuser adds visual depth and aerodynamic function to the B9 rear bumper. Works especially well on the RS5 and S5 trims where the bumper already features a sport-oriented cutout design.
5. Mirror Caps
Carbon fiber mirror caps are one of the most popular detail upgrades for the B9 platform. Easy to install, immediately visible, and they tie together any exterior build — whether you’re running a full aero kit or keeping it subtle.
Build Your B9
Carbon District parts for the Audi A5, S5, and RS5 B9/B9.5 are manufactured to OEM tolerances and finished to show-car standards. Browse our B9 collection and find the upgrades that match your build.
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