They were only 2.85 a piece. I bought them here in Indy so no shipment. They are recommended for the rear side of a trailer or cab of a truck. I wanted to try to reduce the bugs also the wind noise in the cab. Some of you guys had spoilers, I wanted something different they do look kinda cool on the camper. They recommend 3 per foot, my Northern Lite is 8 across I did not want them to interfere with my clearance light on the truck so they are just behind the lights. I'm going to the Ohio rally tomorrow, then a big trip in July so I should have the data and share it with everyone.
Bobndot The guy I got these from has several trucks in his fleet and does safe a small about of fuel. Also he had a costumer with a large goose neck trailer and he stated the trailer handles a lot better in truck traffic and cross winds. Thanks for all the interest... ART