Re: Hope For Lifted 4x4s
My material is 3/4 inch by 24" conveyor belt. I got it at a local industrial rubber supply house. The stuff is not cheap and it is a bear to work with. It has a lot of steel "angel hair" in it like a tire. I cut mine with a Sawzall with a hacksaw blade and drilled it with a wood bit, but the wood bit was shot after nine holes. The upside is that this stuff is completely invulnerable to the dead dogs you hit on the road. Mine is held on by nine nutserts and capscrews with fender washers. It goes on (after the holes are cut) and comes off in five minutes with a ratchet and socket.
Some advice from experience.
When fitting up the air dam put a couple of one bys under it. I used one and had it initially 3/4 inch above grade. It rubbed on the ground when I hit the brakes and the truck nose-dived in reaction. After a while it stopped rubbing at about 1.5 inch clearance. The closer the better, but it will rub on real world roads if you don't give it some clearance. I called it "letting the road mark the air dam."
When fitting up the air dam, start in the center and put 4-6 washers between the air dam. One the holes beside the center one reduce the washer count by one. At the next hole reduce again. Finally you reach zero. The idea here is to impart somewhat of a "bow" or "cowcatcher" to the air dam so it will tend to bat the air to the side rather than drive it along like a bulldozer blade. As a result of my flat air dam the center of the thing vibrated like a clarinet reed and haggled up the holes.
After the air dam is fitted up, make a papaer pattern of your holes and cut a piece of metal (I'm thinking 12 ga stainless) about 4 inches wide to act as an improved "washer" and spread the clamping load out along the whole upper part of the air dam. Fender washers don't really spread the load enough and when the dam got to working, the fender washer edges started cutting into the rubber, weakening the air dam.
The air dam never seems to catch on anything, but if you have a yen to go off road I'd recommend stopping and spending five minutes getting it off. Mine tolerates 3 inches of snow but 5 inches defeats it. That's why it is rolled up in the garage until the snow quits.
It never fouled the front tires but if you want to drive the truck up some ramps for service, you may need to take it off to do so.
I suppose you could paint this stuff but I don't know how well it would stick.
Paradoxically, the air dam helps with engine cooling. All that air that normally goes under the truck is cut off and a vacuum forms under the truck. The vacuum aided by the higher pressure at the grille will jam more air through you radiator/intercooler/AC condensor.
2000 F-350 SC 4x2 6 speed
3.08 gears Gear Vendor Overdrive
Rugged Air Dam