APR Catback Exhaust System RS4 (B9) for 2018-2025 Audi RS5 and RS5 Sportback
Part # CBK0037
- Complete catalyst-back system including downpipes, extending from the factory catalyst back.
- Performance gains of 9 HP and 15 FT-LBS of torque delivered to all four wheels.
- 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.
- 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.
- Includes an upgraded tunnel brace to accommodate the larger piping.
- Integrated Helmholtz resonator minimizes drone and enhances sound quality.
- Valve-controlled rear mufflers dynamically adjust sound based on driving style.
- Dual 7.25”x5” RS-style diamond black oval tips with APR logo.
- Smooth transitions and straight-through components maximize performance by reducing restrictions.
- Strikes the perfect balance of power, sound, style, and quality for enthusiasts.
- Fully emissions compliant for worry-free operation.
Description
PLEASE NOTE* Some B9.5 vehicles will come equipped with an update valve motor. If you have a valve actuator with part number 8S0-133-246-D please call us at 1 (800) 680-7921 and request adapter EXH0712. We will expedite an adapter at no charge with proof of purchase.
Specifications
| Brackets | Precise |
|---|---|
| Clamping Type | Slip Clamp |
| Clamps Included | Yes |
| Exhaust Tip Color | Black |
| Exhaust Tip Diameter | 7.25x5 in |
| Exhaust Tip Quantity | 2 |
| Finish | Brushed |
| Grade Type | Performance |
| Hangers Included | Yes |
| Main Piping Diameter | 2.75 in |
| Material | T304 Stainless Steel |
| Muffler Finish | Brushed |
| Muffler Quantity | 2 |
| Muffler Type | Sound Absorption |
| Pipe Bend Type | Mandrel |
| Pipe Material | T304 Stainless Steel |
| System Type | Catback |
| Tail Pipe Outlet Outside Diameter | 2.5 in |
| Tip Style | RS-Style Oval |
| Tube Connection | Butt Joint |
| Valve Included | Yes |
| Valve Type | OEM |
| Welding | TIG |
| UPC / GTIN | 00810009932840 |
| Warranty | Warranted to be free from defects in the materials and workmanship prior to installation |
| Year | Make | Model | Engine |
|---|---|---|---|
| 2018 - 2019 | Audi | RS5 | 2.9L V6 |
| 2021 - 2024 | Audi | RS5 | 2.9L V6 |
| 2019 | Audi | RS5 Sportback | 2.9L V6 |
| 2021 - 2025 | Audi | RS5 Sportback | 2.9L V6 |