The Truck Lites came today via FedEx. Perfect timing as we are in the middle of a heat wave, 14* in the garage, so I installed them. Maybe in a few months I'll actually get a chance to use them. Install was easy despite the cold. The passing lights have a lot of wire and a big plug on the end that connects to the existing HD plug. Just had to make sure that the connectors were at the top of the lamp so that I wouldn't squash anything. The curvature of the lamp appeared to be similar to the OEM lamp. I just might be able to use my Cee Bailey amber lens on them. I didn't need to buy another harness. The 2 bulb halogen light was plugged into the H4 connector.