I just made a set for my 88 Pathfinder out of 1/2" cutting boards. I used 2, 16"x22" boards I bought at a restaraut equipment store for $13 each, then just used self drilling screws to mount them. Didn't make any cuts on them, just mounted the front one widthwise, and the rear one length wise. My only concern is the exhaust pipe sitting so close, but at the same time it's one of my biggest worries under there after nearly ripping the crossover pipe out of my 93 on a rock. They'll get a good test this next weekend at Coal Creek though .