Twin turbo headers and piping

Can add the twin air water intercooler rated at 600hp each, for a little more money, need to upgrade these for my build just for the power on race fuel my engine will make. Here's what they look like, dimensions are from frozenboost.com:
Water to Air Intercooler, 150PSI 12x12.25x4.5, S/S I/O (Type 51)

type51.jpg