[Sci-Fi]

Kenne Bell or ASE (believe they recently relocated to Mexico) has to reprogram your computer since the "chip" is soldered in and is not really replacable or a replacement chip cannot be easily "plugged in". You have to decide whether the performance is worth the time and monety and having to pay/use premium gas.

IMHO, it is often better if you live close to either Kenne Bell or ASE, to go there and have them reprogram your computer (and automatic transmission, if equipped) on their dyno facilities so you get the maximium performance for your particular car. I know of one person that went back several times to get the automatic to shift the way he wanted it to. Otherwise, you will get a universal remapping of your computer. Also, if you read some of the literature, you "may" need to replace your thermostat with a 180° one and HP claims range from 7hp to 23 hp. As mentioned before, if there is a TSB that requires the flashing of your computer to correct the problem or if the dealer service department routinely upgrades your computer to the latest version while you are in for service, then you will lose whatever custom programming Kenne Bell or ASE you had before and have to pay again to have it redone.

Do a search for JET module at the various PT forums and PTDIY and you may find the PT versions were recalled by JET and have been taken off the market.
http://www.ptdoityourself.net/tl/tl_12.html#277