the car is a 03 cobra

I was wondering what are some power mods i can do without actually doing a dyno tune. Mods that i can still go at WOT, without doing any
damage. basic bolt-ons i guess would be my question.

Car is stock except for Bassani stainless steel cat back.

when i went to dyno it, the power to the wheels came in at 367, with 355 ft lbs of tq. this was done before the cat back.

P.s. I know a dyno tune would make a great increase of power but i just need to find a dynomometer around my area.