B16A2 NO FURTHER A MYSTERY

2.5" Piping is productive to greater than 600HP, but to be a typical guideline, when sizing piping for just a client motor vehicle, if we know they want to make 600HP off the bat, they will want to make far more electrical power afterwards. Consider it foreseeable future proofing.This is applicable especially for the B18A1, B18A2, B18B1, and B18B2