Hi, I'm new here, just purchased my first Explorer less than a week ago, and look forward to having some fun with it. I used to hang out at F-150 Online (actually still do...) but traded my 1999 F-150 for the explorer. I had a SuperChip Flip-Chip in the F-150, but when I called about haveing the it reprogrammed I was told it wouldn't work in the 2003 Explorer. I have never heard of the apten chip, where can I do more research on this item. The only mods I had to my truck were and aftermarket Gibson Cat back exhaust and the Flip-Chip, and was very pleased with the improvements. I'd like to make similar improvements to my new X. The folks at SuperChips did mention they are currently working on a new micro tuner for the 03-04 Explorers, but it won't be available until mid 2004. The one available for the F-150 sounds nice, with three pre-programed settings plus the ability to set top speed limiter, shift points, shift firmness, and calibrate for changes to tire size or rear end gearing. Plus it also acts as a code reader. I'm thinking this my be my first performance mod! Has anyone else heard about these?