The sound difference is 1, valves open and closed and 2, with or without Dinan tune.
There was no comparison between a stock exhaust and the Dinan exhaust. All of the above is deeper than stock.
__________________
2020 BMW X3M Competition ///M - ALPINE WHITE / SAKHIR ORANGE
Past: 18' BMW M3CS | 18' BMW X5M | '17 BMW M3 Competition | '16 Mercedes GLC250 | '16 BMW X5M | '15 BMW X5 M50d | '14 Audi SQ5
|