Milltek Sport Downpipes - 2018-2022 Audi TT RS Mk3

These Milltek Sport parts fit the 2018-2022 Audi TT RS coupe (Mk3, 8S) with the 2.5 liter TFSI turbo five. These Milltek parts for the Mk3 TT RS include large-bore downpipes with a 200-cell cat, a hi-flow sports cat or no cat, plus a secondary cat bypass pipe. A Milltek hot-side part replaces the restrictive factory section with larger, smoother T304L tubing, so exhaust gas leaves the engine with less resistance. Pick a catted version to keep a catalytic converter in the system, or a catless version for a dedicated track car. The Audi TT RS Mk3 parts are T304L stainless steel with mandrel-bent tubing, which keeps the pipe at full size through each bend and resists corrosion for years. They bolt in place of the factory parts with no cutting or welding.

How to Choose

Choose the Part you need. Secondary Cat Bypass replaces the secondary catalytic converters with a straight pipe (race product); it is not needed with a Milltek turbo-back system, and not every car has secondary cats, so please check under your car first. Catless Downpipe has no catalytic converter; it is for off-road and track use only and needs an ECU remap. Catted 200-Cell Downpipe is a large-bore downpipe with a high-flow 200-cell catalyst; Milltek lists it as a race product and it needs an ECU remap. Catted Hi-Flow Sports Cat Downpipe is a large-bore downpipe with a hi-flow sports catalyst; Milltek does not list it as a race product, but it still needs an ECU remap.

Pair them with the Milltek cat-back for the Audi TT RS Mk3 for a complete Milltek exhaust.

Features

• 76.2 mm (3 in) T304L stainless steel pipework
• Mandrel-bent and made to bolt to the factory mounting points
• Catted and catless options explained in How to Choose

What's Included

• The Milltek parts for the version you choose

Specifications

Fitment Notes

• Fits the 2018-2022 US-market Audi TT RS coupe (Mk3). The same parts fit the RS3 8V sedan, which has its own page.
• Every downpipe here fits both the factory and the Milltek cat-back. Because of the turbo wastegate design, a catless downpipe can cause a metallic rattle, according to Milltek.
• Catless parts remove the catalytic converter. They are sold for off-road and competition use only and are not legal on public roads in the US.

Questions about fitment? Call (310) 231-0292 or text (310) 886-3111.