Having a true 3" would being harder to sell, you would need 3" mids or after the dps you would have a bottleneck at the flange where it meets the mids...AR does look to have the smoothest tapper to 2.5"
2007 //M Coupe. BSM. Fabspeed headers. Catless. BMS x-pipe. Strömung cans. evolve tune. Fortune/Broadway Static 500 coilovers.
My Build Thread