SKU: 86944136242

Milltek Dual 2.25" Cat-back Exhaust - Audi B7 S4 4.2L V8

Sale price$657.45 Regular price$730.50
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 3 - Aug 8

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Description

Milltek Dual 2.25" Cat-back Exhaust - Audi B7 S4 4.2L V8Installing a high flow catback exhaust is a quick way to pick up horsepower and torque. A catback exhaust will also give your Audi B7 S4 4. 2L V8 a sportier tone. All Milltek catback exhaust systems feature a bolt on design and mate seamlessly with your factory or most aftermarket downpipes. The resonated catback exhaust features a center resonator and rear muffler producing a more refined and quieter exhaust tone while the non resonated systems

Installing a high flow catback exhaust is a quick way to pick up horsepower and torque. A catback exhaust will also give your Audi B7 S4 4.2L V8 a sportier tone. All Milltek catback exhaust systems feature a bolt-on design and mate seamlessly with your factory or most aftermarket downpipes.

The resonated catback exhaust features a center resonator and rear muffler producing a more refined and quieter exhaust tone while the non-resonated systems incorporate only a rear muffler and provide a louder more aggressive tone compared to the resonated systems.

Milltek Sport exhausts are produced in high quality type-304 aircraft grade in dual 2.25" stainless steel tubing. This quality of stainless steel is used on all pipework and the total construction of the silencer. Mandrel bending ensures full flow bends for better gas flow and Milltek systems are increased in bore to ensure ultimate performance without the loss of mid-range torque.

Available Tips: Dual 100mm Polished Tips in two styles, GT100 and 100mm Jet.

Product Details:

-Available in dual 2.25"
-Highest quality aircraft-grade stainless steel
-Sharper throttle response
-Substantial weight savings
-Precision quality
-Reduced back pressure for max performance - no loss of low end torque!






Milltek Part Numbers

SSXAU048 - 2.25" Non-Resonated Cat-back Exhaust (Polished Tips)
SSXAU046 - 2.25" Resonated Cat-back Exhaust (Polished Tips)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • 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]
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SKU: 86944136242

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TIsbell
Phoenix, US
★★★★★ 4
Design and comfort
Size: 7.5, Color: Taupe
Light weight, seems to be of good quality. Comfortable so far. True to fit
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Reviewed in the United States on June 4, 2026
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Karlie
Belleville, US
★★★★★ 5
Love these
Size: 11.5 Wide, Color: White
For a plus size, tall woman that feet swell these sandals were perfect.They were not tight.They're very comfortable.The straps adjust perfectly and have a little bit of stretch in them.I was able to walk with them with no issue.They actually have great traction on the bottom.And surprisingly very durable.
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Reviewed in the United States on May 23, 2026
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Evelyn Hill
Houston, US
★★★★★ 5
Super comfortable and extremely flattering
Size: 9.5, Color: Black
Love! Love! Love! Even though they are very flat sandals, the soul has just enough cushion to feel like you’re walking on a cloud. I also love the location of the straps. As someone with bunions, they cover them perfectly and make my feet look attractive while not being completely covered.
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Reviewed in the United States on April 26, 2026
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Caitlin’s Cozy Home
Lowell, US
★★★★★ 3
Comfortable at first, but didn’t hold up long-term
Size: 8, Color: Tan
The size felt true and the feel was comfortable right out of the box. I liked the softness of the footbed, and the wearability was good for everyday errands and casual outings at first. Unfortunately, after about six months of regular use, they started falling apart. While the versatility was nice and the thickness felt fine for warm weather, the overall durability just wasn’t there. They’re okay for short-term use, but I wouldn’t expect them to last long.
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Reviewed in the United States on December 20, 2025
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Jennifer
Lake Worth, US
★★★★★ 5
Great quality
Size: 10, Color: Tan
Great quality leather sandals I bought to replace a worn out pair. They are comfortable and not stiff. Hoping the rubber sole lasts a long time. They look nice with jeans, shorts or casual dresses.
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Reviewed in the United States on May 7, 2026

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