I just recently bought a gtech pro off of ebay and have tested out my jeep. Typically with one passenger, quarter tank of gas, and practically everythign in it (subs, spare, hiking junk). I set it all up perfectly and i ran anything from 15.6's-15.7's and occasionaly around 16.2. It seemed whenver i tried doing a brakestand it gave me over 16, and when i just floored it from a stop (no traciton issues), it did under 16. But it just doesnt seem to make sense to me because i didnt think that a rustys air tube with 9"inch cone, poweraid tbs, dual electric fan conversion, and magnaflow 2.25" catback would give me that much. Also, does anyone have any idea of how to squeeze any more performance out for cheap? I wish i could find a way to put the IAT sensor into the air tube but idk how.