I guess you are wanting to go the big n lil route, if you have brembo's on front you have to do 18's front and 17's on rear. I have seen guys do 15's on the rear on 15-17's but you have to mod the brakes I believe
Thanks for the input .... Don't want to spend $ to revise back brakes to run 15's when the cost would almost pay for 17's with DR's. 18's on front & 17's on rear it is....
You will need a set of some kind of smaller drag brakes for the back to fit the 15s. I did it. I got aerospaces. Sold my car and got a 2014 gt500 lol so I have them sitting in a box