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Vivid Racing Gear 
APR Catback Exhaust System for Audi B9 S4 and S5
If you're looking to enhance your 2018-2025 Audi S4 or S5, the APR Catback Exhaust System is a must-have upgrade. This comprehensive exhaust solution runs the full length of your vehicle, starting from the catalyst and extending back, delivering not just performance, but also an exhilarating sound that will turn heads.
Performance Meets Aesthetics
Inspired by the performance-oriented design of the RS4 and RS5 models, this exhaust system is engineered to provide an impressive boost of 10 horsepower and 12 ft-lbs of torque to all four wheels. You'll experience a bold, aggressive growl at wide-open throttle that makes every drive an event. Plus, with customizable exhaust tips, you can add a personal touch that complements your Audi's style.
Durability and Engineering Excellence
Constructed from premium T304 stainless steel, the APR Catback Exhaust System is built to last. The mandrel-bent piping features a brushed finish and is TIG welded for maximum strength and durability. This system is designed to withstand the rigors of daily driving and spirited track sessions alike.
Innovative Design for Optimal Flow
This exhaust system features a reengineered routing design that minimizes restrictions. It includes:
- Dual 2.5" downpipes transitioning to dual 2.75" midpipes
- A massive 3.5" midpipe that replaces the restrictive factory setup
- An integrated Helmholtz resonator to minimize drone while enhancing sound quality
The result? Smooth transitions and straight-through components that maximize exhaust flow and performance.
Dynamic Sound Control
One of the standout features of this system is its valve-controlled rear mufflers. These valves are fully integrated with your Audi's OEM control system, allowing them to adjust automatically. You’ll enjoy a louder, more aggressive sound during spirited driving while maintaining a quieter profile for those everyday commutes.
Easy Installation
Installation is straightforward with precision-fit brackets and OEM-style slip clamps included. An upgraded tunnel brace is also provided to accommodate the larger piping, ensuring a hassle-free setup.
Specifications
- Material: T304 Stainless Steel
- Muffler Style: Sound Absorption, Helmholtz
- Tip Count: 4
- Tip Diameter: 3.5"
- Tube Diameter: 2.5", 2.75", 3.5"
- Welding: TIG
- Valve Actuation: OEM
Why Choose APR?
The APR Catback Exhaust System is not just about sound; it's about delivering a complete performance upgrade for your Audi B9 S4 or S5. With its perfect blend of power, sound, and quality, this exhaust system is an investment that will enhance your driving experience for years to come.
Don't just take our word for it; Audi S4 owners have reported significant improvements in both sound and performance after installation. Upgrade your ride today and feel the APR difference!
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
APR is a company that was founded in 1997 and specialized in providing high-performance parts for the automotive industry. They cater to various automotive platforms such as Audi, Seat, Skoda, Volkswagen, Porsche, and more. Today, they are considered the global leader when it comes to aftermarket performance parts.
Wide Range Of ProductsAPR develops and produces a wide range of products from software, hardware, data logging, calibration tools, intake components, exhaust systems, transmission controllers, turbochargers, intercoolers, wheels, suspension parts, brake systems, and more.
Meeting Customers DemandsThe demand for their products has grown over the years. But even so, they can accommodate everyone by using their 80,000 square foot facility located in Opelika, Alabam. This facility houses state-of-the-art manufacturing equipment that allows them to create some of the best products in the market.
Quality ProductsEach part is carefully designed and cut with precision to ensure that it fits perfectly on the vehicle. The company caters to some of the best automotive brands globally, so it is just that they create parts that are par with it in terms of quality and performance.
Purchase APR Products At Vivid RacingIf you are in the market for high-quality performance parts for your vehicle, then APR is the brand for you. They have been in the automotive business for more than 20 years and have given their customers the products they duly deserve. To know more about APR and what they can offer, visit Vivid Racing and check out their list of parts that would fit your specific needs.
| Sale price | None |
| Wholesale price | $1,651.96 |
| Shipping |
Weight: 75.00 Length: ? Width: ? Height: ? |
| Product Added At | Wednesday 26 March, 2025 |
| Product Modified At | Thursday 10 July, 2025 |
| Imported By | ETLOverride |
| Last Edited By | vendordata@vividracing.com |
| View In Admin |
| Carb Approved | No |
|---|---|
| Carb Number | - |
| Epa Status | - |
| Prop65 | - |
| Carb Required | - |
| Vendor | Inv | Cost | Retail | Jobber | MAP | Core | Updated | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Holley Performance Products Inc. | $1,399.97 | $2,249.95 | ? | $1,999.95 | ? | 2025-07-10 19:27:53 |
