You will get the least restrictive intake with an elbow, a short pipe and a large filter. This way you have to remove your battery, but otherwise it's not a big deal. As far as getting cold air to the filter, I made a few runs without the passenger's side head lamp last year. It made no difference in intake temps... There are a few home made cold airs, the best I've seen is in Gary's Sy in Florida. However IMHO these intakes will restrict the flow to your filter and give you only marginaly lower intake temps...
Later,