The CTS Turbo resonator delete kit is designed for the Audi S4 B9 3.0T. It provides the benefits of a freer-flowing exhaust section based on the factory Audi part, without the need to replace the entire exhaust system.
Features:
– Replaces the factory resonator on the original cat-back exhaust system with a freer-flowing exhaust section.
– Adds a pleasant, deeper sound to the exhaust system without replacing the entire system.
– Increases exhaust volume without unwanted cabin drone.
– Made from durable T304 stainless steel.
– Stainless steel exhaust system clamps are included.
– Installation is quick and requires only basic hand tools.
– Installation is fully reversible, allowing the vehicle to be returned to its original condition.
– According to the manufacturer, it does not cause loss of warranty coverage or trigger the engine warning light.
The kit is compatible with factory and replacement downpipe systems, but is intended exclusively for the original cat-back exhaust system. It is not compatible with replacement cat-back exhaust systems.
Suitable for: Audi S4 VIII (B9).
Approval
This part has no TÜV certification (ABE, TTG or Teilegutachten).
Compatible vehicles (manufacturer data)
| Vehicle | Chassis | Years | Engine |
|---|---|---|---|
| Audi S4 | — | 2017–2021 | — |
Before ordering, check that the product matches your vehicle (model, year and engine). If in doubt, write to us — we will check for you.

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