Cobra Audi S3 8P 2.0 Ab-Kat Auspuffanlage 3" Edelstahl Resonanz 3 Türer AU08

(AU08 / YTP10L). IMPORTANT NOTE:-Resonated - Quieter. 3" Cat Back System Resonated. What is the difference between resonated and non-resonated systems?. Resonators are box chambers incorporated into the exhaust system, which are used to make the exhaust quieter, by cancelling certain sound frequencies.

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