If i were to get an exhuast custom made would 2.5" all the way around be a good size. i mean i've heard and even seen the video from rev-t up that 3" is overkill. or should i just wait it out to about the end of this month where most of our exhuast will be out.

2.5" will be plenty, go with that from the cat back.

the video was our 2.5 ' which we are very happy with, 3 " didnt do it for us, we loss alot of bottom end