If you’re looking to give your Audi B9 SQ5 a voice that matches its performance, the APR Rear Catback Exhaust System is where it’s at. This isn’t just another exhaust system; it’s designed for enthusiasts who appreciate that deep, aggressive growl that makes your heart race. It’s a direct bolt-on replacement for your factory exhaust, or you can pair it with the APR Midpipe for an even more exhilarating experience.

What sets this system apart? It’s inspired by the RS4 and RS5 models, which means it’s built with a larger center-pipe design that enhances both sound and performance. You’ll notice a boost of 5 AWHP and 6 AWFT-LBS on its own, but if you decide to go all in with the APR Midpipe, you’re looking at a solid gain of 10 AWHP and 12 AWFT-LBS. That’s some serious power for your daily drive.

The construction is top-notch, made from T304 stainless steel that’s not just durable but also looks sharp with its brushed finish. The mandrel-bent piping ensures smooth exhaust flow—no restrictions here. Plus, the whole thing is TIG-welded for added strength, so you know it can handle whatever you throw at it.

Installation? Easy-peasy. With precision-fit brackets and OEM-style slip clamps, you won’t be wrestling with this system for hours. It even comes with an upgraded tunnel brace to accommodate the bigger piping. And let’s not forget the integrated exhaust valve that works with your car’s OEM control system. It adjusts the sound based on how you’re driving—quiet when you’re cruising and a fierce roar when you hit the gas.

The design features dual 2.75" midpipes that merge into a hefty 3.5" midpipe. This upgrade replaces the restrictive factory setup, letting your SQ5 breathe freely. When the valve is closed, exhaust gases flow through the rear muffler, which is engineered to minimize drone while still delivering a rich sound. Open it up, and you get an unfiltered roar that’ll turn heads.

So, if you’re serious about enhancing your SQ5’s sound and performance, the APR Rear Catback Exhaust System is a no-brainer. It’s all about that perfect balance of power, sound, and quality. Plus, it’s fully emissions compliant, so you can enjoy the ride without any worries.

• Directly bolts on to APR Midpipe System or factory setup.
• Performance boost of 5 AWHP and 6 AWFT-LBS, or 10 AWHP and 12 AWFT-LBS with APR Midpipe.
• Durable T304 stainless steel with TIG welding for long-lasting performance.
• Optimized flow with dual 2.75" midpipes merging into a 3.5" midpipe.
• Brushed finish and electropolished cast splitters for a sleek look.
• Easy installation with precision brackets and slip clamps.
• Integrated muffler reduces drone while enhancing sound quality.
• Dynamic valve-controlled rear muffler adjusts sound based on your driving style.
• Smooth transitions and straight-through design to maximize performance.
• Perfectly balances power, sound, and style for true enthusiasts.
• Fully emissions compliant for peace of mind.

• Bending: Mandrel
• Brackets: Precise
• Brand: APR
• Category: Exhaust
• Clamp Style: Slip Clamp
• Clamps Included: Yes
• Exit Tube Diameter: 3"
• Material: T304 Stainless Steel
• Muffler Finish: Brushed
• Muffler Style: Sound Absorption
• Tube Connection: Butt Joint
• Tube Diameter: 3.5", 2.75", 3"
• Tube Finish: Brushed
• Valve Actuation: OEM
• Valves: Yes
• Version: Catback
• Welding: TIG

Fits: Audi SQ5 2018-2025 CBK0057 APR Rear Catback Exhaust System - SQ5 (B9).