APR Audi 18-25 RS5 (B9) Catback Exhaust System - CBK0037

The APR Catback Exhaust System for the Audi B9 RS4 and RS5 is a complete, high-performance exhaust solution that runs the entire length of the vehicle from the catalyst back. This system is engineered to boost performance, elevate sound, and enhance aesthetics with RS-style diamond black oval exhaust tips that are sure to make a statement. Crafted from premium materials and built with advanced manufacturing techniques, this system is designed to withstand harsh conditions and deliver lasting performance. Expect a bold, aggressive growl at wide-open throttle, along with an impressive gain of 9 horsepower and 15 FT-LBS of torque to all four wheels!

PLEASE NOTE: Some B9.5 vehicles may be equipped with an updated valve motor. Vehicles with valve actuator P/N 8S0-133-246-D require adapter P/N EXH0712. The required adapter is available at no charge with proof of purchase.

Please call us at 1 (800) 680-7921 and request adapter EXH0712. We will expedite an adapter at no charge with proof of purchase.

Features & Benefits

• Smooth transitions and straight-through components maximize performance by reducing restrictions.
• Complete catalyst-back system including downpipes, extending from the factory catalyst back.
• Mandrel-bent brushed piping paired with electropolished cast splitters for a refined finish.
• Precision brackets and slip clamps ensure accurate alignment and hassle-free installation.
• Premium T304 stainless steel construction with TIG welding for strength and durability.
• Optimized flow through dual 2.75” downpipes, 3.5” midpipe, and quad 2.5” exits.
• Strikes the perfect balance of power, sound, style, and quality for enthusiasts.
• Performance gains of 9 HP and 15 FT-LBS of torque delivered to all four wheels.
• Valve-controlled rear mufflers dynamically adjust sound based on driving style.
• Integrated Helmholtz resonator minimizes drone and enhances sound quality.
• Includes an upgraded tunnel brace to accommodate the larger piping.
• Dual 7.25”x5” RS-style diamond black oval tips with APR logo.
• Fully emissions compliant for worry-free operation.

Fitment has not been independently verified for your vehicle. Confirm the manufacturer application against your year, make, model, trim, and modifications before ordering.

Processing and carrier timing vary by stock status and destination. Final shipping services and costs are confirmed at checkout.

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