This harness gives you the access to 2 Ground Trigger Inputs, 2 Ground Trigger Outputs, also the Points Output, Tachometer output, and Digital Gauge Output Wires. The Input Grounds can be used for things such as AC Kick, and nitrous stage activation! The Output Grounds can be used for Electronic Fan Control, or A/C Shutdown at WOT. This harness includes an additional 0-5v TPS output commonly used for Transmission Control units, and a Tach output wire to drive most common aftermarket tachometers.