I bought the exact same Bullit wheels and size fro OE wheels, but mines are gloss Black, I've had them for a year and I can tell you the quality of the wheel is great, I have mine New Edge Mustang Droped 1" 1/2 inch and front and rear don't rub with the wheels or original Calipers
I have 3.73 gears on my mines and was debating as you wether to get the 4.10 gears . For the gears you do not require a tune. The only thing is your Speedometer will be a bit off.
3.73 gears are great for Daily drivers, and if your doing highway driving , 4.10 would be more for Track, in...
I have 245/40/18 Front and 18x10 275/40/18 rears and the 275 are flush, DO NOT GET 275 on the rear wheels, you will eventually scrap the wheel on a curb , I'm replacing them with 295/35/18