IF IT IS A JIM-WOLF THEN THEY CAN RECHIP YOUR CURRENT CHIP FOR ONLY A 100DOLLORS SO IT WILL SAVE YOU MORE THERE IM NOT SURE IF Z1 WILL DO THE SAME BUT IM SURE ABOUT JW AND ALSO IF YOUR GOING TO BE UPGRADING YOUR ECU ANYWAY YOU COULD JUST SEND THE CHIP TO THEM AND THEY CAN TELL YOU IF ITS THEIRS ONE LAST THING YOU CAN FIND JIM WOLF EPROM UPGRADES ON EBAY OR EVEN SOMETIMES ON HERE THUS SAVING YOU EVEN MORE