Sale

Exhaust› Exhaust Pipes, Systems and Components

Milltek

Resonated Cat-Back Exhaust System w/ Quad GT100 Tips

$2,752.00 $2,669.44 Save $82.56

SKU: SSXAU475

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Milltek SSXAU475 is a resonated cat-back exhaust system designed as a direct replacement for the original system. It features quad 100mm GT100 Cerakote Black tips and is constructed from 304L "Aircraft" Grade stainless steel for durability.

The cat-back system is available in multiple configurations, allowing owners to choose their desired exhaust volume and tone.
Show original supplier description
The Milltek SSXAU475 is a resonated cat-back exhaust system engineered for the Audi S3 8V/V.2 models (2013-2018, Non-GPF equipped). It serves as a direct replacement for the factory exhaust, aiming to enhance both the sound and aesthetics of the vehicle. This system features quad 100mm GT100 Cerakote Black tips, providing a distinct visual upgrade. Constructed from premium 304L "Aircraft" Grade stainless steel, this cat-back system is built for exceptional durability and resistance to corrosion, ensuring a long lifespan even under demanding conditions. The resonated design contributes to a sportier and crisper tone without inducing unwanted cabin resonance or drone, making it suitable for daily driving. Fitment requires the use of the original equipment (OE) valve motor from the stock exhaust. A specific fitting kit (SSXAU475) is included and available for download. Milltek emphasizes that their products are designed with optimized gasflow and carefully enlarged bore diameters over stock, aiming for improved performance without sacrificing mid-range torque. This system is compatible with Audi S3 8V/V.2 models from 2013 to 2018 that are Non-GPF equipped. For vehicles with GPF (Gasoline Particulate Filter), a different system would be required.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMilltek
Part NumberSSXAU475
CategoryExhaust

Videos

MILLTEK CATBACK EXHAUST INSTALL | AUDI S3 | Edge Autosport

MILLTEK CATBACK EXHAUST INSTALL | AUDI S3 | Edge Autosport
8V S3 Mods: Milltek Cat-Back Exhaust & APR 4 Piece Intake [with before and after sounds]

8V S3 Mods: Milltek Cat-Back Exhaust & APR 4 Piece Intake [with before and after sounds]
Audi S3 - Milltek Non-res Cat-back Exhaust Install

Audi S3 - Milltek Non-res Cat-back Exhaust Install
8V.2 S3 (GPF) Milltek Resonated GPF Back Exhaust Install with Exhaust Sounds

8V.2 S3 (GPF) Milltek Resonated GPF Back Exhaust Install with Exhaust Sounds
2017 Audi S3 8V Milltek Cat-back Non-resonated Exhaust

2017 Audi S3 8V Milltek Cat-back Non-resonated Exhaust
AUDI S3 8V WITH MILLTEK VALVED NON-RES CAT BACK & STOCK DOWNPIPES | COLD START UP | S3Ranj

AUDI S3 8V WITH MILLTEK VALVED NON-RES CAT BACK & STOCK DOWNPIPES | COLD START UP | S3Ranj
Audi S3 8V Milltek Cat Back Exhaust

Audi S3 8V Milltek Cat Back Exhaust
Milltek Audi S3 8V 2015+ | Non-Resonated Valved Cat-Back Exhaust | TAG Motorsports

Milltek Audi S3 8V 2015+ | Non-Resonated Valved Cat-Back Exhaust | TAG Motorsports
Audi S3 Exhaust Sound 🔥 Stock,Milltek,Akrapovic,Remus,AWE,Review,Straight Pipe,Mods,Upgrade,Borla+

Audi S3 Exhaust Sound 🔥 Stock,Milltek,Akrapovic,Remus,AWE,Review,Straight Pipe,Mods,Upgrade,Borla+
8V S3 Exhaust (Milltek Resonated), 4 Piece Intake, APR ECU & DSG Software [+81HP & +93lbfts]

8V S3 Exhaust (Milltek Resonated), 4 Piece Intake, APR ECU & DSG Software [+81HP & +93lbfts]
2014 S3 MIlltek Exhaust - Idle + Rev Comparison

2014 S3 MIlltek Exhaust - Idle + Rev Comparison
TUNED Audi S3 Stage 1 with Milltek Exhaust Review & Drive | RAW Sound + POV (4K)

TUNED Audi S3 Stage 1 with Milltek Exhaust Review & Drive | RAW Sound + POV (4K)

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy