99 ls1 hypertech programmer question
i was wondering if this would be compatible with the 1998 ls1?
anybody know
HPPIII is a waste of money, for a little more you can buy HP Tuners or LS1 Edit. Or you could just go to a shop that has the software and let them tune your car. There are alot more parameters to be tweaked that the handheld just can't do.


