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.
5857035: Mandrel
3293585: Precise
81813: APR
60522: Slip Clamp
Clamps Included: Yes
3294145: 5
Exhaust Tip Color: Polished
5867488: 2.5
Material: T304 Stainless Steel
Muffler Finish: Brushed
71299: Sound Absorption, Helmholtz
3294148: Exhaust Catback System
5865451: 4
Tip Diameter: 3.5
59845: Carbon Fiber with Brushed Inlay
5865452: Yes
5865454: Butt Joint
Tube Diameter: 3.5
Tube Diameter: 2.75
Tube Diameter: 2.5
Tube Finish: Brushed
5865457: OEM
5856820: Yes
3294120: California Proposition 65
5865458: TIG
Year
Make
Model
Submodel
Engine
2018, 2021 - 2024
Audi
S4
Base
3.0L
2019 - 2025
Audi
S4
Premium
3.0L
2018 - 2025
Audi
S4
Premium Plus
3.0L
2018 - 2025
Audi
S4
Prestige
3.0L
2018 - 2022
Audi
S4
Progressiv
3.0L
2018 - 2024
Audi
S4
Technik
3.0L
2018 - 2019, 2021 - 2025
Audi
S5
Base
3.0L
2019 - 2024
Audi
S5
Premium
3.0L
2018 - 2024
Audi
S5
Premium Plus
3.0L
2018 - 2024
Audi
S5
Prestige
3.0L
2018 - 2024
Audi
S5
Progressiv
3.0L
2018 - 2024
Audi
S5
Technik
3.0L
2019, 2021 - 2025
Audi
S5 Sportback
Base
3.0L
2020 - 2025
Audi
S5 Sportback
Premium
3.0L
2018 - 2025
Audi
S5 Sportback
Premium Plus
3.0L
2018 - 2025
Audi
S5 Sportback
Prestige
3.0L
2018 - 2025
Audi
S5 Sportback
Progressiv
3.0L
2018 - 2025
Audi
S5 Sportback
Technik
3.0L
