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Exhaust› Catalytic Converters

Milltek

200-Cell Race Catalyst Downpipe

Name: 200-Cell Race Catalyst Downpipe
Brand: Milltek
SKU: SSXAU605

$1,049.32

SKU: SSXAU605

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$100 Minimum Order

Non-Returnable Item

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Moderate — 2–4 hours

Overview

The Milltek SSXAU605 is a stainless steel cast downpipe designed for Audi TTS MK3 Non-GPF models. It features a 200-cell race catalyst, which is significantly freer-flowing than standard OEM catalysts (500-600 cells), improving gas-flow and performance.

This downpipe is designed for fitment with the OE exhaust system only and requires a Stage 2 ECU remap to function correctly.

Show original supplier description

The Milltek SSXAU605 is a large bore, stainless steel cast downpipe engineered to enhance gas-flow and heat management for increased efficiency and performance gains on Audi TTS MK3 Non-GPF models. This performance downpipe incorporates a 200-cell race catalyst, which is considerably less restrictive than the standard OEM catalysts (typically 500-600 cells), resulting in improved exhaust gas flow and enhanced engine performance. Constructed from T304L stainless steel, this downpipe is designed for a direct fitment using OEM mounting points and hangers, requiring no modifications for installation. Its 3.00-inch (76.2mm) diameter further contributes to optimal gas flow. Crucially, the Milltek SSXAU605 is designed exclusively for fitment with the OE (Original Equipment) exhaust system only. It also mandates a Stage 2 ECU remap to ensure proper operation and to fully realize its performance potential. This product is intended for vehicle modification, and its use may be restricted to off-road or competition purposes depending on local regulations.

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
Part Number	SSXAU605
Category	Exhaust

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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

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