Description
Fits Audi S4 18-25, S5 18-25
Introducing the APR Catback Exhaust System for the Audi B9 S4 and S5
- 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.
Specification:
| Bending | Mandrel |
|---|---|
| Brackets | Precise |
| Brand | APR |
| Clamp Style | Slip Clamp |
| Clamps Included | Yes |
| Emission Code | 5 |
| Exhaust Tip Color | Polished |
| Exit Tube Diameter | 2.5 |
| Material | T304 Stainless Steel |
| Muffler Finish | Brushed |
| Muffler Style | Sound Absorption, Helmholtz |
| Product Type | Exhaust Catback System |
| Tip Count | 4 |
| Tip Diameter | 3.5 |
| Tip Finish | Carbon Fiber with Brushed Inlay |
| Tips Removable | Yes |
| Tube Connection | Butt Joint |
| Tube Diameter | 3.5 |
| Tube Diameter | 2.75 |
| Tube Diameter | 2.5 |
| Tube Finish | Brushed |
| Valve Actuation | OEM |
| Valves | Yes |
| Warning | California Proposition 65 |
| Welding | TIG |
