i know they offer the superchips-hypertech-and xcalibrator. has anyone used the new hypertech power pack or had any experience with it. it is kinda pricey.

Xcal 2 is supposed to be the best out now, I have the old SCT 9100 handeheld, holds three custom tumes, but the XCAL 2 also data logs, you can change timing, etc all with your handheld through your PCM