Hi David
Welcome to the Forum
Very tasty looking car as the power plant is basically the same as the M4 what about exploring an exhaust swap ?
I would think Centre box back would be pretty much the same. just how that could effect warranty I am not sure if all parts are OEM
Just thinking out loud
Dave
God afternoon David and welcome to the forum.
very nice car and a good colour choice!
it’s been a while since I modded exhausts but I’m sure power flow or similar can give you what you need