Professional Answer to Exhaust Size Question 2.5" vs 3"

Well, I ordered the 3" TTI this week. Once I get it installed I will post some video. Went with the recommended Dynomax Turbos and X pipe. I always have my 2.5" x-pipe system if I want to go with that and run ultraflow's later. (which I planned on using for Coronet but who knows) Thanks for all the input Guys, it really helps.