Yeah there are a lot of things you can do to increase 7.3 performance: turbo, injectors, exhaust, cold air intake, chip/tune, intercooler, water/meth injection, HPOP, and more.
I’ve saved some of my favorite threads over the years…
I would start with a hydra & EGT gauge first. For more money 4"Exhaust/downpipe. If that is not enough than you need a bigger pocket and a good tranny also