- Complete catalyst-back system including downpipes, extending from the factory catalyst back.
- Performance gains of 10 HP and 12 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 2.5” downpipes, 2.75” midpipes, and a 3.5” midpipe.
- 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.
- Removable quad 3.5” motorsport-style polished tips with APR logo; optional styles available.
- 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
Introducing the APR Catback Exhaust System for the Audi B9 S4 and S5
Specifications
| Brackets | Precise |
|---|---|
| Clamping Type | Slip Clamp |
| Clamps Included | Yes |
| Exhaust Tip Color | Polished |
| Exhaust Tip Diameter | 3.5 in |
| Exhaust Tip Finish | Carbon Fiber with Brushed Inlay |
| Exhaust Tip Quantity | 4 |
| Exhaust Tip Removable | Yes |
| Finish | Brushed |
| Grade Type | Performance |
| Hangers Included | Yes |
| Main Piping Diameter | 2.50 in |
| Material | T304 Stainless Steel |
| Muffler Finish | Brushed |
| Muffler Quantity | 2 |
| Muffler Type | Helmholtz |
| Pipe Bend Type | Mandrel |
| Pipe Material | T304 Stainless Steel |
| System Type | Catback |
| Tail Pipe Outlet Outside Diameter | 2.5 in |
| Tube Connection | Butt Joint |
| Valve Included | Yes |
| Valve Type | OEM |
| Welding | TIG |
| UPC / GTIN | 00810009932550 |
| Warranty | Warranted to be free from defects in the materials and workmanship prior to installation |
| Year | Make | Model | Engine |
|---|---|---|---|
| 2018 - 2025 | Audi | S4 | 3.0L V6 |
| 2018 - 2024 | Audi | S5 | 3.0L V6 |
| 2018 - 2025 | Audi | S5 Sportback | 3.0L V6 |