I found this gauge that plugs into the obd2 port and can read 20 parameters that the computer can see. Here are some examples ACT, Water temp, injector pulse width bank 1 and 2, transmission tempeture, o2 sensors, speed, rpm, maf # per min, maf voltage and several others. It can also read codes and clear dtc. It fits in the space of the standard 2 1/16 gauge. Green is not available yet but in mid october it will be. follow the link.