Exhaust› Exhaust Pipes, Systems and Components

Milltek

Hi-Flow Sports Cat Exhaust System

$5,987.72

SKU: SSXAU956

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

Fabricated with a larger diameter than standard OEM parts, they allow more gas to exit the engine, increasing efficiency. Combined with the included Hi-Flow Sports Cat, you can expect a significant increase in performance and a noticeable difference in sound.
Show original supplier description
These downpipes are crafted from premium T304 stainless steel, ensuring durability and longevity. With a 3.0" (76.20mm) pipe diameter, these components provide significantly more space for exhaust gases to exit the engine, thereby increasing efficiency. The integrated high-flow sports catalytic converter features 200 CPSI (cells per square inch) to maintain environmental standards while enhancing performance. However, it is important to note that a Stage 2 ECU Remap is required for proper operation. The installation time is estimated to be between 3.5 to 4.5 hours. These downpipes are compatible with specific Audi models including the RS Q8 4M (2021+) 4.0T Quattro, SQ7 4M (2020+) 4.0L, and SQ8 4M (2020+) 4.0T V8.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandMilltek
Part NumberSSXAU956
CategoryExhaust
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1M+ Enthusiasts
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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