I've heard R/T Tuning is one of the better places.
A buddy of mine had his Evo X brought to them and it now has 400WHP and his Black Supra was fitted with racing seats, harness, and it also is built with 600WHP but the capabilities to go much greater.
Where are you fellas located in relation to Philadelphia?
Black Mamba Project
Custom Stainless Cat-Back Straight Pipe Exhaust
Charcoal Tails / Side Markers