Rear cats deleted, higher flow dual exhaust, k&n filters, maf debur and elbow debaffle, new plugs and wires, traction off. Thats it. My buddy brought his 03 Mustang GT down the same night. He has rear cat delete, duals w/ flow super40s, x-pipe, 5 spd, CAI. He was upset when I beat him 4 for 4, but, in his defense, he was having a hard time with traction. I tried in his car and could barely get in the 15s and he was running high 14s, lol. On the street, I can get the little crossfire, with perfect shifts, to briefly spin tires into second and chirp into third at roughly 50mph. It does lack the power that I am used to, but runs out pretty well for a six cylinder. I still like the car. Hoping to do a Eurotune and 74mm tb/ elbow soon. Maybe make a CAI setup for it as well and underdrives. Should break 13s with those???