Judging by the gains folks have gotten on here, I would save your dough for a mod with documented gains, like an off road y pipe or the Apex'i S-AFC or possibly a new Pro-M MAF with calibrator. The reason I say this is that I put the correctly coded diablosport chip on my SVT that just had intake and exhaust and the chip was dyno proven to cost me 8 hp (173 witout, 165 with) and 6 ft lbs of torque (155 without, 149 with) with losses documented all along both power curves. Knowing what I know now, I do not think I will ever buy another off the shelf chip. I plan on eventually getting an autologic chip based on a professional dyno-tune for my new mustang way out in the future after all my mods are done.
Just my 2/100 of a dollar based on some hard learned lessons. Don't waste your $250 unless you have a stock car...but if you go with one the superchips seem to be better for the tours.
