The sublime "Quick Run Harness" had a few perks for me.. Saved me some money since I had a good oem harness. It also has radiator fan relays built into the panel with stock plug for dual charger fans as well as air-conditioning relay and trigger lead. The AC relay utilizes the oem compressor wiring.. Few less things on my to do list. But the compressor needs to be the single plug style compact.. Jeep I think. I had to use anyway for space. The kit also comes with whatever throttle connector you need. In my case, I'm running a bellcrank, which is standard on his harness.