The USB programmable 123\TUNE-4-R-V-P is designed for Porsche 912 / 914 / 356

For Bosch D-Jetronic fuel Injection engines choose the non programmable: 123\PORSCHE-4-R-V-IE

If you want to tune your engine, or you have an engine for which there is no standard distributor available….. And you are a Windows PC user, the 123\TUNE is the answer! By connecting it to a computer, you can easily adapt the 123\TUNE to fulfill even the most demanding requirements. The unit offers two sets of curves that can be selected by placing 12 Volt on a wire from the 123\TUNE. Handy, if you’re driving on two different fuels, like regular fuel with LPG or with Ethanol