Exhaust› Exhaust Pipes, Systems and Components

MilltekSport

Cat-Back Exhaust System, Quad Polished Oval Tips

$1,868.22

SKU: SSXAU531

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

Moderate — 2–4 hours

Overview

The MilltekSport SSXAU531 is a cat-back exhaust system designed for the Audi S3 2.0 TFSI Quattro Sportback 8V. This non-valved, non-resonated system is constructed from 304L aircraft-grade stainless steel for durability and performance.

It features a 3.00" pipe diameter and includes a center silencer delete pipe, a rear silencer, and quad polished oval tips measuring 104x80mm.

This exhaust system is specifically designed for 2013-2018 Audi S3 2.0 TFSI Quattro Sportback models that are not equipped with a GPF (Gasoline Particulate Filter).
Show original supplier description
The MilltekSport SSXAU531 is a high-performance cat-back exhaust system engineered for the Audi S3 2.0 TFSI Quattro Sportback 8V models from 2013 to 2018, specifically those not equipped with a GPF (Gasoline Particulate Filter). Constructed from premium Type 304L aircraft-grade stainless steel, this system offers superior corrosion resistance and longevity. It features a 3.00" (76.20mm) pipe diameter, a center silencer delete pipe, a non-valved rear silencer, and four polished oval tips (104x80mm), delivering an aggressive, non-resonated sound profile. Milltek Sport exhausts are known for enhancing performance and driveability, offering a sharper throttle response and a substantial weight saving compared to original equipment. The use of mandrel-bent pipes ensures full flow for improved gas flow and maximum performance without sacrificing mid-range torque. This system is designed, developed, and manufactured in the UK. It comes with a lifetime guarantee for the first purchaser, excluding cats, flexes, and valved sections. It is important to note that de-cats, sports/race cats, and GPF bypass deletes are intended for motorsport use only.

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

BrandMilltekSport
Part NumberSSXAU531
CategoryExhaust
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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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