Exhaust› Catalytic Converters

Milltek Sport

Performance Large Bore Downpipe with High-Flow Cat

$1,127.78

SKU: SSXAU727

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Milltek Sport SSXAU727 is a large-bore downpipe designed for performance enhancement. Constructed from aerospace-grade T304 stainless steel, it features mandrel-bent pipework for optimized gas flow with enlarged bore diameters to maximize performance without sacrificing mid-range torque. This downpipe includes a high-flow catalytic converter with 200 CPSI.
Show original supplier description
The Milltek Sport SSXAU727 is a large-bore downpipe engineered to significantly improve exhaust flow for enhanced performance in Audi RS3 (8V/8Y) and MK3 TTRS models. Crafted from aerospace-grade Type 304, non-magnetic stainless steel, this component is built for exceptional durability and resistance to discoloration. Mandrel bending is utilized throughout the construction to ensure consistent radius bends, optimizing gas flow. This downpipe also features a high-flow catalyst with 200 CPSI (cells per square inch). The SSXAU727 is designed for direct fitment with both original equipment (OE) and Milltek Sport cat-back exhaust systems. It is important to note that this product is intended for off-road or motorsport use only. Its use may inhibit a vehicle's ability to pass a MOT test, as only EC type-approved components are legal for road use. Some related products or configurations may require Stage 2 ECU software for optimal performance.

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 Sport
Part NumberSSXAU727
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.

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