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Exhaust› Exhaust Pipes, Systems and Components

Milltek Sport

3-inch Large-Bore Downpipe and De-cat

Name: 3-inch Large-Bore Downpipe and De-cat
Brand: Milltek Sport
SKU: SSXVW348

$604.31

SKU: SSXVW348

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Milltek Sport Large-bore Downpipe and De-cat is a 3-inch (76.2mm) exhaust component designed for use with the OE system. It is crafted from aerospace-grade Type 304 non-magnetic stainless steel for durability and resistance to discolouration. Mandrel bending ensures optimized gas flow, and enlarged bore diameters aim to enhance performance without sacrificing mid-range torque.

This de-cat pipe is intended for off-road or motorsport use only and will prevent a vehicle from passing an MOT test. Only EC type-approved components are legal for road use.

Show original supplier description

The Milltek Sport Large-bore Downpipe and De-cat is a performance exhaust component featuring a 3-inch (76.2mm) diameter, crafted from aerospace-grade Type 304 non-magnetic stainless steel. This superior material ensures longevity and resistance to discoloration, common issues with lesser exhaust materials. The construction utilizes mandrel bending to maintain constant radius bends, optimizing gas flow for improved performance. Milltek Sport exhaust systems undergo a rigorous acoustic development process to achieve a sporty and crisp exhaust note, while actively preventing undesirable NVH, drone, or cabin resonance, ensuring a refined driving experience. The system does not feature ValveSonic technology. Please be advised that this de-cat pipe is intended for off-road or motorsport use exclusively. Its installation will prevent the vehicle from passing an official MOT (Ministry of Transport) test, as only EC type-approved components are considered legal and road-worthy. This product is compatible with non-GPF equipped models of the Audi S3 (8V/8V.2) from 2013-2018 and Audi A3 (8V US-only) from 2014-2020.

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

Brand	Milltek Sport
Part Number	SSXVW348
Category	Exhaust

Videos

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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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