Hello, I have a 1.8l 125 HP Audi Cabriolet Bj 1998 on which the rear silencer at approx. 1900 U/min is bullying. So to the friendly one, who says that only original fits and that costs approx. 300-400 Euro… is this also a little cheaper? Or do there also third-party parts and if yes, which ones? Thank you in advance…