From now on, I offer a new system: the virtual exhaust (for short “VES”. to the mode of operation: the VES is a stamen valve that is welded in the downpipe before or instead of the catalyst. the VES has a pressure box similar to the wastegate on the turbocharger. is no or only low pressure (e.g. in urban traffic), the valve remains closed and everything is as always. however, if you give gas and build up charging pressure, the valve opens and releases the exhaust flow in part. The backlog of the exhaust system is thus significantly reduced and the sound is really brilliant. on a chipped 180pser could be measured with the VES +23ps !! the VES are preset and ready to be installed in the diameters 63.5mm and 70mm in short. the price is 279.- euro plus shipping / assembly. more information is available at tuner your trust.