CTS is proud to announce our resonator delete kit for the B9 Audi S4 3.0T. Get all the benefits of using this resonator delete (based on factory Audi part) without the high price tag. \n \nFeatures: \n- Replaces the factory resonator on stock cat-back exhaust assembly with our high flow exhaust section. \n- Adds a nice deep exhaust note without the need for replacing the entire exhaust system. \n- Increase exhaust sound without adding drone. \n- Made from durable T304 Stainless Steel. \n- Stainless steel exhaust band clamps included. \n- Installs quickly using simple hand tools. \n- Completely reversible install. \n- Does not void warranty or cause a check engine light. \n \nFitment: \n

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• 2017-2021 B9 Audi S4
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\nNote: compatible with factory and aftermarket downpipes; but it is for factory cat-back exhaust only, does not fit aftermarket exhaust systems. \n \nFOR FACTORY CATBACK EXHAUST ONLY. \n \n  \n \n