There are certain times in the cabin under specific acceleration or rpms that you can tell a difference but its NOT an issue or a deal breaker. It's very suttle nice to hear.
The reason I haven't bought a catback yet is b/c I probably have a customer ride w/ me once or twice a month and this car can NOT be loud or abnoxious in the cabin. This DP doesn't even come close to that.
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2013 F30 335i ///M-Sport
Forgestar/Challenge/BMS JB4
Wagner/Evo Race/M-Performance
2016 F15 50i ///M-Sport
BM3/H&R/Borla
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