OK, you’ve done nearly everything economically possible to your 7.3L Super Duty or Excursion. You’ve upgraded the intake and exhaust, added a programmer, and possibly even upsized the injectors. Sure the truck runs better, but you’ve noticed that the EGTs are starting to climb into the danger zone at wide-open throttle or when towing a heavy trailer up a grade. The missing element in your power recipe is more air. While the stock Garrett turbo functions well on a stock truck, it can’t keep up with the added heat that more fuel creates.