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Description
APR CBK0057 - Rear Catback Exhaust System - SQ5 (B9)Fits Audi SQ5 18 25 Overview Introducing the APR Rear Catback Exhaust System for the Audi B9 SQ5 The APR Rear Catback Exhaust System for your Audi B9 SQ5 introduces a deeper and more aggressive growl to your vehicles exhaust note. The system is a direct bolt on with your factory exhaust system or can be combined with the APR Midpipe Exhaust System for a more refined and more powerful full catback experience! Inspired by the larger center pipe design
Fits Audi SQ5 18-25
Overview
Introducing the APR Rear Catback Exhaust System for the Audi B9 SQ5 The APR Rear Catback Exhaust System for your Audi B9 SQ5 introduces a deeper and more aggressive growl to your vehicle’s exhaust note. The system is a direct bolt on with your factory exhaust system or can be combined with the APR Midpipe Exhaust System for a more refined and more powerful full catback experience! Inspired by the larger center-pipe design of the higher-output RS4 and RS5 models, this system is engineered to boost performance and elevate sound. Crafted from premium materials and built with advanced manufacturing techniques, this system is will withstand harsh conditions and deliver lasting performance. Expect a bold, aggressive growl at wide-open throttle, along with a gain of 5 AWHP and 6 AWFT-LBS or an impressive gain of 10 AWHP and 12 AWFT-LBS when combined with the APR Midpipe Exhaust System! Unmatched Design and Precision Engineering Unlike anything currently available, the APR system starts just after the midpipes but can be combined with our midpipe system to making this a true full-system upgrade. We’ve minimized restrictions with smooth transitions, oversized piping, and a straight-through rear muffler / Helmholtz resonators. Constructed from mandrel-bent T304 stainless steel with a brushed finish and TIG welding throughout, this exhaust system is as durable as it is striking. Installation is hassle-free, thanks to precision-fit brackets, OEM-style slip clamps, and an included upgraded tunnel brace to accommodate the oversized piping. Inspired by RS Performance Like the RS4 and RS5, this system features a reengineered exhaust routing design. It utilizes a dual 2.75” (70mm) midpipes merging through a cast Y-junction into a massive 3.5” (91mm) midpipe, replacing the restrictive factory dual-pipe setup. The exhaust valve is fully integrated with the OEM control system, adjusting automatically to enhance sound during aggressive driving while maintaining a quieter profile during cruising. When closed, exhaust gasses route through the rear muffler featuring straight-through sound absorption technology and when open, bypasses the rear muffler all together. Experience the APR Difference Designed for enthusiasts seeking the perfect balance of power, sound, and quality, the APR Midback Exhaust System for the Audi SQ5 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.
Features:
- Plug-and-Play with APR Midpipe System or factory system.
- Performance gains of 5 AWHP and 6 AWFT-LBS of torque on their own or 10 AWHP and 12 AWFT-LBS of torque when combined with the APR Midpipe System.
- Premium T304 stainless steel construction with TIG welding for strength and durability.
- Optimized flow through dual 2.75” midpipes to single 3.5” midpipe exiting through dual 3” downturns.
- 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.
- Integrated muffler minimizes drone and enhances sound quality.
- Valve-controlled rear muffler dynamically adjust sound based on driving style.
- 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.
Specs
| Bending | Mandrel |
|---|---|
| Brackets | Precise |
| Brand | APR |
| Category | Exhaust |
| Clamp Style | Slip Clamp |
| Clamps Included | Yes |
| Emission Code | 6 |
| Exit Tube Diameter | 3 |
| Material | T304 Stainless Steel |
| Muffler Finish | Brushed |
| Muffler Style | Sound Absorption |
| Product Type | Exhausts (Catback Systems) |
| Sub Category | Exhaust and Tail Pipes |
| Tube Connection | Butt Joint |
| Tube Diameter | 2.75 IN |
| 3 | |
| 3.5 IN | |
| Tube Finish | Brushed |
| Valve Actuation | OEM |
| Valves | Yes |
| Version | Catback |
| Welding | TIG |
| UPC | 810009935551 |
| Part Number | CBK0057 |
Tech Resources
Please note: Fitment excludes vehicles equipped with S Sport Package / Air SuspensionShipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
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Product Reviews
★★★★★ 5
Open your mind to discover the electric you !
Format: Paperback
Electric body electric health is an informative book, presenting and clarifying what it means to be electric. A concept to change the mindset not specifically challenging current medical cosmology models but presenting a sound case for the electric body within the electric universe. As a PT Movement educator and Biofield Tuning practitioner certified and educated by Eileen McKusick (the author) along with Jillian Faldmo Rn and Angela Kent , this book solidifies my strength as a Practitioner and melding movement breath and voltage. In a world where sitting, zooming and taking pills or alcohol to escape is prevalent, Eileen provides the tools as simple as laugh , sing and dance but also the science to include feeding our micro cells at the tiniest micro level, their nourishment through utilizing oxygen from nature, plants we eat , clean water. Electric interactions, including what we know and theorize with the electron transport chain of energy as well as the Krebs cycle with its energetic reactions, gives the argument to think electrically and be electric to shine your light. Shining your light is a perfect example of melding electric and emotional as our body reacts to memories , sounds and movement. I am grateful to be part of the biofieldtuning family. I am grateful as Brene Brown says, as Eileen "dared greatly". Her boldness to dare to challenge the norm and present the electric health within the electric universe. Our spark is our connection to each other and our light shines as we care for our inner body, our Biofield around us and our Electric universe .
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Reviewed in the United States on February 24, 2021
★★★★★ 5
Must read
Format: Audiobook
One of the best books I’ve ever read and I’m a voracious reader. Life changing!
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Reviewed in the United States on January 9, 2026
★★★★★ 4
Surprisingly good!
Format: Paperback
I came into this with a certain amount of skepticism and was glad to read the author's candid remarks about learning about how she uses sound to help people out. McKusick does a good job of weaving together personal experiences, interactions with others and published scientific picture to give a complete view about how energy flows through us in much different ways then we are aware of or that we allow ourselves to investigate and explore. She has put in years to learn more about electricity, the connection of the body with sound and how pain can be an indicator of more than your physical body. Anyone with an open mind, even someone like me who's not a Deepak Chopra type of person, will take things away from this and will learn more about something they haven't heard about before reading this book. Good overall read!
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Reviewed in the United States on August 12, 2023
★★★★★ 5
More people should know this
Format: Paperback
Great information!
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Invaluable trauma therapy resource with 125 practical exercises!
Format: Paperback
The Somatic Psychotherapy Toolbox is an invaluable resource! The 125 worksheets and exercises are practical and well-designed for treating trauma and stress. As a therapist, I find these tools extremely helpful with clients. The book is well-organized and the exercises are grounded in evidence-based somatic therapy principles.
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Reviewed in the United States on March 27, 2026