My car was tuned last august. Ive driven about 6,000mi. However, i just changed my intake pipe from a crush bent 2.5 pipe (pretty damn restrictive) to a mandrel bent 3in pipe and changed out my gsr TB to an itr TB. Is this enough to justify a retune? Or maybe change the plugs, run it for a couple days and if therye white maybe up the fuel pressure a lb or so. TIA