2018 is still stock , so not sure if this will apply.
On my 2012 I have Supercharger , Headers no Cats and Corsa's , Was Loud and Raspy.
Added a MagnaFlow Resonated X Pipe .
Only reduced the Volume by a few DB's at Idle , but took the edge/raspy
tone away .
Can easily carry on a conversation while driving , if not over 40% throttle
