The bottom line is for those tire sizes you need wider wheels. And 315 in the rear would be appropriate for a staggered setup (for example, 20x11 wheel in the rear).
I agree the 18+ are louder but I've never heard an S550 with stock manifolds that's as loud as one with headers and a loud cat back like Corsa Extreme, Borla Atak, Roush, etc. Even if the one with headers is a 15-17. An example is a couple who show up to our meets (hers is a 15-17 with headers...
I worked at Ross Tower in downtown Dallas from 2011 to 2021. I parked in a garage at Patterson and Ervay St. Some of my co-workers parked in one at San Jacinto and Ervay. I never had any issues or heard of any co-workers having their cars vandalized, etc.
I've seen pics of Royal Maroon B429s online but never knew whether the color was more rare or not. I saw this red one a few months ago in Sam Pack's collection. I'd take one in any color, lol.
When I had my 3.7 it droned with cheaper mufflers, even when I still had the stock resonator in place. Eventually I got a Borla S-type axle back, and the drone was gone. Still no drone with the Borla mufflers and an X-pipe. This tells me the muffler design is the primary factor in limiting...
It's more of an overall wear and tear issue for me. I put 10-12k miles per year on the Mustang just from weekend meets, cruises, etc. and trips across the country. It's nice not to add daily mileage to that, and to keep it out of bad weather.
Nice looking ride! A lot of people like the 305/35 in the rear with 20s for how well it fills the wheel gap. It will result in speedometer error, though, because of the taller tire.
A 305/30 will be a little shorter in diameter than your 275/35 front, so a 315/30 rear would match up better from...