Milltek Sport Downpipes - 2017-2020 Audi RS3 8V Sedan

These Milltek Sport parts fit the 2017-2020 Audi RS3 sedan (8V) with the 2.5 liter TFSI turbo five. These Milltek parts for the 8V RS3 sedan 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. Every Audi RS3 8V system is made from T304L stainless steel with mandrel-bent tubing, so the pipe keeps its full size through each bend and resists corrosion for years. It bolts on with the factory hangers and clamps, with no cutting or welding needed. They are made from T304L stainless steel and bolt in place of the factory parts.

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. Catless Downpipe V2 is the second version of Milltek's catless downpipe; 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.

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 below

What's Included

• LH Secondary Catalyst Bypass Pipe
• RH Secondary Catalyst Bypass Pipe

Specifications

Fitment Notes

• Fits the 2017-2020 US-market Audi RS3 sedan (8V). Not for the 2022 and later RS3 8Y, which has its own page. The same parts fit the TT RS Mk3.
• 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.
• Professional installation is recommended.

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