APR Catback Exhaust - S4 S5 (B9)

Fits Audi S4 18-25, S5 18-25

Introducing the APR Catback Exhaust for the Audi B9 S4 and S5

Features & Benefits:

• 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.

Specifications:

• Bending: Mandrel
• Brackets: Precise
• Category: Exhaust
• Clamp Style: Slip Clamp
• Clamps Included: Yes
• Emission Code: 5
• Exhaust Tip colour: 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 fibre 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

Vehicle Compatibility:

• Audi S5 Sportback (2018-2025)
• Audi S5 (2018-2025)
• Audi S4 (2018-2025)

About APR:

Founded in 1997, APR is the global leader in performance aftermarket products for Volkswagen, Audi, Seat, Skoda, Porsche, and other vehicles. APR develops and manufactures hardware, software, calibration & data-logging tools for engine and transmission controllers, including intakes, exhaust systems, intercoolers, turbocharger systems, suspension, brake systems, wheels, and more. APR delivers software via a 24-hour automated global delivery system from its 80,000 square foot state of the art facility in Opelika, Alabama.

Founded in 1997, APR is the global leader in performance aftermarket products for Volkswagen, Audi, Seat, Skoda, Porsche, and other vehicles. APR develops and manufactures hardware, software, calibration & data-logging tools for engine and transmission controllers, including intakes, exhaust systems, intercoolers, turbocharger systems, suspension, brake systems, wheels, and more. APR delivers software via a 24-hour automated global delivery system from its 80,000 square foot state of the art facility in Opelika, Alabama.