Jury is still out on its performance over cheaper options that can be had for half the price. I'm still working on my 1969 F250, so I haven't gotten to use it yet. But be aware that if you use the 2 headlight harness, unlike all the other harnesses I've had experience with, this company still uses two h4 male plugs. One for the low beams and one for the high beams. So you have to run one to each light. Problem is they don't make the one furthest away from battery side long enough to reach. Which appears to be a flaw in their design. They should extend that portion of the harness and run the wires in the same loom as that side h4 female connector. Since you have to run both to that side anyhow as they want you to do, one to connect to the light, the other to the OEM plug, it just makes sense. Instead they want you to purchase h4 extensions to reach, which not only adds another point of failure with another connection, but their extensions look cheap with a plastic covering instead of the braided loom of the original harness. So if you're trying to clean up your wiring and make things look good in the process, this just will make things more cluttered and less professional in appearance. Since I don't like the look, I have to spend my own time combining the two h4 male connections by adding the missing function, removing the extra spliced ground, re-heat shrinking, and relooming. Not to mention, even though it's stated in the description, "Bosch style," these basically run Chinese knockoff relays that are most likely no better than the cheap kits that come with the other style of relays. For the price they want for these harnesses, they should come with actual Bosch relays. Not to mention, shipping prices are ridiculous. These don't even ship in a well packaged box, but a thin bubble wrap mailer. They charge double the cost of the actual shipping. And if you pay the difference to ship with FedEx to get the package a little quicker, they will ignore that and still ship ups surepost. Which if it was ups ground, that's fine and I would stick with it and not pay the upgrade, but this only travels ups to your local area and then package gets transferred to the USPS for delivery, which takes longer to arrive, since the post office will sit on it for a day or two before they ship out. And one last thing, is I'm not sure of the connection method of their wire splices. I'll find out when I modify my harness. I asked and customer service stated it was mechanically spliced, however I don't feel a copper splice connector or see the outline of one under the heat shrink. I hope it's not solder as you never want soldered connections in an automotive application as the vibrations of traveling down the road will cause a bad connection overtime due to the solder wicking into the wires, making the area soldered hard and rigid, which will start breaking copper strands, eventually snapping in half, or breaking enough to result in high resistance and potentially create a fire hazard, or most likely result in non functioning headlights.
