What spacers should I get for my mk5 Supra I’m currently running 275 in the front and 305 in the back on the stock rims which size spacers should I put on the car to give it that wider stance or flushed look with the fender ?
13mm front 15mm back is what I run with a tiny bit of camber and it's pretty flush, albeit I'm on stock springs/ride height and 285's in the rear. With 305's in the rear you might want to consider 13mm in the back depending on your camber/height. Got my sets from Burger.
13/15 gets you close to flush, 15/18 is dead flush with rubbing issues on springs. Won't be able to fit a 305 with the 18mm.
IMO 265/285 15/18 is the best setup for stock wheels. Plenty of pics on my page