APR - CBK0012
APR Catback Exhaust System - S4 / S5 (B9)
Fits Audi S4 18-25, S5 18-25
Designed for enthusiasts seeking the perfect balance of power, sound, style, and quality, the APR Catback Exhaust System for the Audi B9 S4 and S5 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.
- 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.
Bending: Mandrel
Brackets: Precise
Brand: APR
Category: Exhaust
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: Exhausts (Catback Systems)
Sub Category: Exhaust and Tail Pipes
Tip Count: 4
Tip Diameter: 3.5
Tip Finish: Carbon Fiber with Brushed Inlay
Tips Removable: Yes
Tube Connection: Butt Joint
Tube Diameter: 2.5
Tube Diameter: 2.75
Tube Diameter: 3.5
Tube Finish: Brushed
Valve Actuation: OEM
Valves: Yes
Warning: California Proposition 65
Welding: TIG
