4" or 5" exhaust?

[Smoker17]

I plan on running a box, injectors, huffer, and all that stuff later down the road, but I have enough cash for an exhaust kit now. I cant decide on eaither 4'' or 5''. What do u guys think? Does it depend on what kind of power i plan or want to make down the road? Bigger is better? This will be a turbo back kit. I'm going to run straight and no muffler.

TIA,

SMoker

 

[RacinDuallie]

4" is fine to 700-750hp after that you'd be better off with 5".....