I found those Nitro power commanders the other day on ebay.

They're basically a kevfuel mod which is a variable resistor that tricks the ECU into thinking that the air entering is colder (therefore denser) and over fuels to accomodate.

The main difference is that the Nitro power commanders are a series of switches that give limited ajustment whereas a variable potentiometer (resistor) gives an unlimited ajustment.

They are in no relation to Dynojets Power commander and are not programmable like a power commander and do not work in the same way but can give similar albeit not as perfect effects as a power commander.

I had a DR350 96 with a 385 bigbore before and dep exhaust and that thing used to haul.