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  1. Ethan-S3

    Exhaust s3 8p /BCS exhaust/ stock to bcs

    Hello i have a question regarding the rubber pipe that is on the rear of the s3 8p i believe it is for the stock system being valved i am stage 2+ and i run a bcs wrc decat full system would it be wise to use that rubber pipe already at the back of the car for the valve of my exhaust or...