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i have the sct tuner from hemifever in my 02 and i love it i had the superchips and sent it back in less than a week the sct is a night and day diffrence in my opinion and has the abilitie of custom tuning depending on ure mods and i think i paid 400$ for it which isnt much more then the superchipsLooking to get a tuner for my 2003 4.7 auto. I have read some good things about the superchips 3845. Any other suggestions?