Cobra Sport Polo GTi Auspuff 1.8 TSi Ab-Kat-Anlage Edelstahl Resonanz 6C VW66

(VW66 / YTP18). Polo Gti 1.8 TSi (6C) 2015 on 2.5" Cat Back System Resonated - Tail Pipe YTP18. Resonated - Quieter. 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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