SKU: 66422488377

APR Catback Exhaust System - Audi RS4 / RS5 (B9)

$1201.05 $1334.50
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Description

APR Catback Exhaust System - Audi RS4 / RS5 (B9)Introducing the APR Catback Exhaust System for the Audi B9 RS4 and RS5 The APR Catback Exhaust System for the Audi B9 RS4 and RS5 is a complete, high performance exhaust solution that runs the entire length of the vehicle from the catalyst back. This system is engineered to boost performance, elevate sound, and enhance aesthetics with RS style diamond black oval exhaust tips that are sure to make a statement. Crafted from premium materials and built


Introducing the APR Catback Exhaust System for the Audi B9 RS4 and RS5

The APR Catback Exhaust System for the Audi B9 RS4 and RS5 is a complete, high-performance exhaust solution that runs the entire length of the vehicle from the catalyst back. This system is engineered to boost performance, elevate sound, and enhance aesthetics with RS-style diamond black oval exhaust tips that are sure to make a statement. Crafted from premium materials and built with advanced manufacturing techniques, this system is designed to withstand harsh conditions and deliver lasting performance. Expect a bold, aggressive growl at wide-open throttle, along with an impressive gain of 9 horsepower and 15 FT-LBS of torque to all four wheels!

Unmatched Design and Precision Engineering

Unlike anything currently available, the APR system includes downpipes extending to the factory catalyst in the upper engine bay, making this a true full-system upgrade. We’ve minimized restrictions with smooth transitions, oversized piping, and straight-through mufflers and 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 stays with the unique single oversized midpipe design. It utilizes dual 2.75” (70mm) downpipes and midpipes that merge through a cast Y-junction into a massive 3.5” (91mm) midpipe. The integrated Helmholtz resonator minimizes drone through a straight-through design with a sound-canceling port, ensuring no compromise in exhaust flow.

The system splits again via another cast Y into two rear, valve-controlled mufflers with sound absorption technology. These valves are fully integrated with the OEM control system, adjusting automatically to enhance sound during aggressive driving while maintaining a quieter profile during cruising. Finally, exhaust gases exit through dual cast Y-junctions into a quad 2.5” (63.5mm) system, terminating via oversized 7.25”x5” RS-style exhaust tips. The tips feature a diamond black finish and a subtle APR logo for a refined touch.

Experience the APR Difference

Designed for enthusiasts seeking the perfect balance of power, sound, style, and quality, the APR Catback Exhaust System for the Audi B9 RS4 and RS5 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:

  • Complete catalyst-back system including downpipes, extending from the factory catalyst back.
  • Performance gains of 9 HP and 15 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 2.75” downpipes, 3.5” midpipe, and quad 2.5” exits.
  • 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.
  • Dual 7.25”x5” RS-style diamond black oval tips with APR logo.
  • 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.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 66422488377

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4.6 ★★★★★
Based on 229 reviews
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B
Bump Bump
Massapequa, US
★★★★★ 5
Highly recommended for any owner of a "Super Chewer."
Rating: ⭐⭐⭐⭐⭐ (5/5) Title: Finally, toys that can actually withstand my Labrador’s jaws! If you own a "power chewer," you know the struggle: you bring home a new toy, and within ten minutes, it’s shredded into a thousand pieces of foam and plastic. After going through countless toys that promised durability but failed within a day, I decided to give the WOWBALA 2-Pack Indestructible Dog Toys a try—and I am genuinely impressed. The Durability Factor The biggest selling point here is the material. These are made from high-density, food-grade nylon, and you can feel the quality the moment you take them out of the package. They are solid, heavy-duty, and have held up perfectly against my Lab’s relentless chewing. Even after a week of heavy use, there are only minor surface marks where his teeth have made contact, rather than the dangerous chunks that usually break off other toys. Design & Engagement The pack comes with two different shapes—a stick and a ring—which is a great variety. The curved, ergonomic design of the stick makes it very easy for my dog to hold between his paws while he chews, and the textured surface seems to really hit the spot for him. I’ve also noticed that it helps keep his breath fresh and his gums healthy since the texture acts almost like a toothbrush while he plays. The "Milky" Scent One thing I was initially skeptical about was the "milky scent." I wondered if it would be overpowering, but it’s actually quite subtle. It was strong enough to immediately pique my dog’s curiosity right out of the box, but it doesn't leave a weird smell on my carpet or hands. It’s clearly effective, as he keeps coming back to these toys even when he has others scattered around the room. Peace of Mind Beyond just being tough, I appreciate that they are non-toxic and dishwasher safe. After a long day of outdoor play in the mud, being able to just toss these into the dishwasher and have them come out clean and sanitized is a huge convenience. Final Verdict If you have a medium to large breed dog that loves to destroy everything in sight, these toys are well worth the $15.99 investment. It’s rare to find a product that lives up to the "indestructible" label, but these truly do. They’ve been a lifesaver for keeping my dog occupied while I’m working from home, and it’s a relief not having to play "clean up the debris" every evening. Pros: Extremely durable high-density nylon. Great value (2-pack). Easy to clean (dishwasher safe). Engaging design for teething, training, and boredom relief. Safe and non-toxic. Cons: Because they are hard nylon, be careful using them indoors on hardwood floors—they can be a bit noisy when dropped! Highly recommended for any owner of a "Super Chewer."
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Reviewed in the United States on May 19, 2026
J
Jill R
Omaha, US
★★★★★ 5
These are way better than I expected and hold up to our aggressive chewer spectacularly!
I got these specifically for our newest pup (an 8 month old lab/pitbull mix--she's a big puppy, lol) who is obsessed with toys and chewing. She has a tendency to go through her toys quick, both chew toys and soft ones, so I wanted something that would last a bit longer for her because I can tell she gets a bit sad when we have to trash one that's hit its lifespan. So far, these have been a big hit! They're the perfect size for her to pick up, the chicken claw-style texture is great for both keeping her interested and giving her some grabbing options, and they do seem to hold up to their claim of being made for aggressive chewers! There's obviously some wear, but it looks like expected chew toy wear; no claws have snapped off, and her chew marks look relatively minimal compared to what she's done to other chews. I also appreciate that these came in a two pack; we have a smaller dog, and while these are technically big for him, he enjoys having one to play with and chew on as well. These have been a pleasant surprise and I actually think I'll come back to buy them again whenever they're spent! Definitely a worthy purchase!
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Reviewed in the United States on June 2, 2026
R
RKM
San Leandro, US
★★★★★ 5
Creepy chicken feet, made for big dogs and Frenchie approved
These chew toys have been a hit with our dogs. We have three French Bulldogs who firmly believe they are ferocious wolf-sized predators, and these toys have held up surprisingly well to their daily chewing sessions. The chicken foot shape keeps them interested, and the durable nylon construction has stood up to much more abuse than many other toys we've tried. The toys are easy for the dogs to grip and carry around, and I appreciate that they're simple to clean when they inevitably get covered in slobber. They've also helped keep the dogs occupied and redirected some of that endless Frenchie energy away from furniture and other household items. Overall, these have proven to be durable, entertaining chew toys that are Frenchie-approved. Although, based on the dramatic growling and victorious prancing around the house, you'd think they personally hunted and defeated a giant prehistoric chicken
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2026
M
Verified Purchase
Mary Solano-Chino
Chelsea, US
★★★★★ 1
Waste of $ smell of bacon went away in 1 day
Dont waste your $ smell of bacon/meat goes away after 1 day. Waste of money & the groove to put peanut butter DOESN'T HOLD ANY PEANUT BUTTER !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 4, 2026
T
The Pink Receipt
Boise, US
★★★★★ 4
Creepy Little Chicken Feet… But My Dog Is Obsessed
Creepy Little Chicken Feet… But My Dog Is Obsessed I am not even going to lie, when I first opened these WOWBALA dog toys, I had to pause for a second because why do they look like actual little chicken feet? 😂 They are definitely a little creepy at first glance, but apparently my dog does not share my human judgment because she went absolutely crazy over them. These come as a 2-pack, and they have a bacon scent that is very much not for me, but clearly made perfect sense to her. The second she got one, it became her new prized possession. She carried it around, chewed on it nonstop, and I am pretty sure she even tried to hide it somewhere in the backyard like she had discovered buried treasure. What impressed me most is how well these hold up. My dog is not gentle with toys at all. She chews like she has a full-time demolition job, and somehow these still look basically new from a normal glance. Up close, yes, you can see where she has been working on it, but it has not broken apart, shredded, or left those annoying little toy pieces all over the floor. If you have ever bought a chew toy that turns into confetti within 20 minutes, you already know why that matters. The nylon feels solid and heavy-duty, and I like that it is made with safe, non-toxic material since this is something she keeps in her mouth for long periods of time. It also keeps her busy, which is a huge win because bored dogs will find their own entertainment, and usually it is something expensive or inconvenient. So yes, the chicken feet design is a little weird. Yes, the bacon smell is definitely for the dog and not the humans. But my dog is obsessed, it keeps her entertained, and it survives her chewing like a champ. That makes this a solid win in my house.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026

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