Milltek Sport Cat-Back Exhaust - 2021-2025 Audi RS7 Sportback C8

This Milltek Sport cat-back exhaust fits the 2021-2025 Audi RS7 Sportback (C8) with the 4.0 liter twin-turbo V8. For the C8 RS7, Milltek offers twin 80 mm non-resonated and resonated systems with an active valved center section and large oval tips, each in a bolt-on or a lower-cost cut-in version, plus optional downpipes. Each system is built for this exact chassis, so it follows the factory routing, hangs from the stock mounts and keeps the ground clearance of the original exhaust. Compared with the factory steel parts it is lighter, flows more freely and gives the engine a clearer, stronger voice under load, without the harsh highway drone of a cheap straight pipe. The Audi RS7 C8 parts are T304L stainless steel with mandrel-bent tubing, which keeps the pipe at full size through each bend and resists corrosion for years. The Bolt-On versions need no cutting or welding; the Cut-In Fit versions need the factory pipe cut to fit. It swaps the factory exhaust from the catalytic converters back, using 80 mm (3.15 in) T304L stainless steel pipework, and bolts to the factory mounting points.

How to Choose

Start with the System. Non-Resonated, Cut-In Fit is the same non-resonated system made to be cut into the factory pipe, the lower-cost way in if you plan to add downpipes later. Resonated, Cut-In Fit is the same resonated system made to be cut into the factory pipe. Non-Resonated, Bolt-On (Loudest) replaces the front silencers with bypass pipes for the loudest V8 note and bolts on with no cutting. Resonated, Bolt-On (Quieter) keeps Milltek front silencers for a deeper tone with less drone and bolts on with no cutting.

Then pick an Exhaust Tip Finish: Polished Oval (bright polished stainless), Cerakote Black Oval (a black Cerakote ceramic coating). The finish changes the look only, not the sound.

The Add Downpipe option bundles a Milltek downpipe with the cat-back. No Downpipe keeps your factory downpipe. Catless Downpipe adds catless downpipes (off-road and track use only). Catted 200-Cell HJS Downpipe adds 80 mm large-bore downpipes with 200-cell HJS cats (race product, ECU remap needed). You can also buy them on their own from the downpipes for the Audi RS7 C8.

Features

• 80 mm (3.15 in) T304L stainless steel pipework
• Mandrel-bent and made to bolt to the factory mounting points
• 2 tip finishes
• Catted and catless options explained in How to Choose

What's Included

• Front silencers or front silencer bypass pipes for the system you choose
• Active valved center section
• Left and right rear sections with valved outlets
• Left and right oval tips in the finish you choose

Specifications

Fitment Notes

• Fits the 2021-2025 US-market Audi RS7 Sportback (C8), including the RS7 Performance. Not for the RS6 Avant; please call us about RS6 fitment.
• Bolt-On systems replace the factory exhaust with no cutting. Cut-In Fit systems need the factory pipe cut to fit and suit owners who plan to add Milltek downpipes later. Every system keeps the factory valves through Milltek's active valved center section and valved outlets.
• Milltek does not list the systems as race products. The downpipe add-ons are race products that need an ECU remap, and the catless downpipe is for off-road or track use only.
• 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.