2 1/2" or 3"

LOL sez you! Ha ha ha ha. I have and will again right soon.

No, you really don't need 3 inch pipeing for the street. Since I still don't know how much power your engine is making, I'll make a blanket statment with a grain of salt for understanding and a rubber band for lee-way.

2-1/2 inch pipeing is fine and enuff for most street machines on the road today.
Look I am trying to be good hear HA ha HA saying that you wont use 450hp on the street.The engine dynoed at 715hp and 698ft of toque.The hp is way to much for the street also see why I am trying to keep it as quiet as passable.I want to see if someone sells a quiet in 3".They will be going in the stock location. Mark