Even if it is a vinyl rather than painted they can still PPF over the top of it - they did with my bonnet decals (stealth for matte and clear for gloss).
Drove it on the highway today with ESE off set to sports exhaust and the sound inside the cabin is definitely not there anymore, the engine sound is more raw and less refined than the soft growl the speakers were playing. Not sure I prefer the sound but I definitely prefer it being real.
Could it be the angle the car sits at affect the forward facing adaptive cruise sensor? Perhaps if the car remains at the same angle (or within 1-2 degrees) post wheel/tyre change everything is fine… can someone work out using agreywolfe’s before and after diameters if there would have been any...
I have made this change now (yet to test on the road but cold start sound from inside the car seems to be the same volume but sounds much more externalised):
Disable ESE (fake engine sounds through the stereo):
Change: 727-01-01 BC33 14FC 103F
To: 727-01-01 BC33 14FC 003F
It looks like mine...
I received some good advice in this thread: https://www.mustang7g.com/forums/threads/soon-to-be-dark-horse-owner-suspension-and-stop-the-hop-upgrade-path.173862/
Take a look there and search for the Ford Performance equivalents to some of the parts suggested.
If you wouldn’t mind the hassle… perhaps you could try mixing the stock fronts and aftermarket rears and see if the problem exists? Not as a permanent solution obviously but just to see whether it is the fronts or rears that cause the issue.
This is from the 6g forum but seems relevant here: https://www.mustang6g.com/forums/threads/official-ford-oem-brembo-6-piston-bed-in-procedure.208242/
Also, taken from the Mustang Owners Manual Track Use section:
Brake Burnishing
Properly burnish the brakes prior to heavy track use. Excessive...