'Dongles' is our best way of describing our array of harness plugs. Our SAS and Canister dongles will eliminate your FI light when the emissions are removed. (Also available bundled in our 'Emissions Removal Kits') Our 'Fueling Dongles' will eliminate your stock O2 sensors by sending a pre set signal to your ECU computer causing it to run smoother and cooler on the bottom to mid range. See details within the product description.