I have a superchip but mine was a custom burn b/c i had the gears (3.73) done at the same time. The custom burn that i had done will require the use of 93+ octane. For the money i really feel the torque and the time slip shows dropped .45 off of et with the gears and chip. If you want to contact the about the chip
www.teamjdm.com read the article under news and events "new 2001 mustang GT finds home at JDM"
These guys are great to deal with and really now what they are doing. Their just breaking into the racing deal so their prices arent that bad. Hope this helps.