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Designed for enthusiasts seeking the perfect balance of power, sound, style, and quality, the APR Catback Exhaust System for the Audi B9 RS4 and RS5 is a testament to engineering excellence. With its performance-driven design and durable construction, this system not only transforms your driving experience but also ensures years of reliable performance.
APR APR Catback Exhaust System - RS4 / RS5 (B9) CBK0037
Specifications:
| quality | Quality - null |
| Bending | Mandrel |
| Brackets | Precise |
| Brand | APR |
| Category | Exhaust |
| Clamp Style | Slip Clamp |
| 1882 | Yes |
| Emission Code | 5 |
| 11205 | Black |
| Exit Tube Diameter | 2.5 |
| Material | T304 Stainless Steel |
| 9882 | Brushed |
| Muffler Style | Sound Absorption, Helmholtz |
| Product Type | Exhausts (Catback Systems) |
| Sub Category | Exhaust and Tail Pipes |
| Tip Count | 2 |
| Tip Diameter | 7.25x5 |
| Tip Style | RS-Style Oval |
| Tube Connection | Butt Joint |
| Tube Diameter | 3.5 |
| Tube Diameter | 2.75 |
| Tube Diameter | 3 |
| Tube Finish | Brushed |
| Valve Actuation | OEM |
| Valves | Yes |
| Warning | California Proposition 65 |
| Welding | TIG |
| Description_INV | B9 RS5 CAT-BACK KIT |
| Description_DES | APR Catback Exhaust System - RS4 / RS5 (B9) |
| Description_EXT | Fits Audi RS4 18-25, RS5 18-25 |
| Description_MKT | Introducing the APR Catback Exhaust System for the Audi B9 RS4 and RS5 |
| Description_MKT | 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! |
| Description_MKT | Unmatched Design and Precision Engineering |
| Description_MKT | Unlike anything currently available, the APR system includes downpipes extending to the factory catalyst in the upper engine bay, making this a true full-system upgrade. We’ve minimized restrictions with smooth transitions, oversized piping, and straight-through mufflers and resonators. Constructed from mandrel-bent T304 stainless steel with a brushed finish and TIG welding throughout, this exhaust system is as durable as it is striking. Installation is hassle-free, thanks to precision-fit brackets, OEM-style slip clamps, and an included upgraded tunnel brace to accommodate the oversized piping. |
| Description_MKT | Inspired by RS Performance |
| Description_MKT | Like the RS4 and RS5, this system stays with the unique single oversized midpipe design. It utilizes dual 2.75” (70mm) downpipes and midpipes that merge through a cast Y-junction into a massive 3.5” (91mm) midpipe. The integrated Helmholtz resonator minimizes drone through a straight-through design with a sound-canceling port, ensuring no compromise in exhaust flow. |
| Description_MKT | The system splits again via another cast Y into two rear, valve-controlled mufflers with sound absorption technology. These valves are fully integrated with the OEM control system, adjusting automatically to enhance sound during aggressive driving while maintaining a quieter profile during cruising. Finally, exhaust gases exit through dual cast Y-junctions into a quad 2.5” (63.5mm) system, terminating via oversized 7.25”x5” RS-style exhaust tips. The tips feature a diamond black finish and a subtle APR logo for a refined touch. |
| Description_MKT | Experience the APR Difference |
| Description_MKT | Designed for enthusiasts seeking the perfect balance of power, sound, style, and quality, the APR Catback Exhaust System for the Audi B9 RS4 and RS5 is a testament to engineering excellence. With its performance-driven design and durable construction, this system not only transforms your driving experience but also ensures years of reliable performance. |
| Description_FAB | Complete catalyst-back system including downpipes, extending from the factory catalyst back. |
| Description_FAB | Performance gains of 9 HP and 15 FT-LBS of torque delivered to all four wheels. |
| Description_FAB | Premium T304 stainless steel construction with TIG welding for strength and durability. |
| Description_FAB | Optimized flow through dual 2.75” downpipes, 3.5” midpipe, and quad 2.5” exits. |
| Description_FAB | Mandrel-bent brushed piping paired with electropolished cast splitters for a refined finish. |
| Description_FAB | Precision brackets and slip clamps ensure accurate alignment and hassle-free installation. |
| Description_FAB | Includes an upgraded tunnel brace to accommodate the larger piping. |
| Description_FAB | Integrated Helmholtz resonator minimizes drone and enhances sound quality. |
| Description_FAB | Valve-controlled rear mufflers dynamically adjust sound based on driving style. |
| Description_FAB | Dual 7.25”x5” RS-style diamond black oval tips with APR logo. |
| Description_FAB | Smooth transitions and straight-through components maximize performance by reducing restrictions. |
| Description_FAB | Strikes the perfect balance of power, sound, style, and quality for enthusiasts. |
| Description_FAB | Fully emissions compliant for worry-free operation. |
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