ok, i got a aftermarket fuel pump, 525cc injectors, plannin on boostin 12-15. i heard that i should get a 3" exhaust from the dp back, would this be the right size to go with, and where could i piping for a reasonable price? thanks

 

You are definately gonna want 3" exaust. You can get if from Kteller on here. Sells stuff in the Marketplace. And PSI doesnt mean anything. What kinda whp you looking for.