John, I also use the snap in type by Lund. Five hard winters and still like new. I run with all four in during coldest weather and just pop a couple out as it starts warming up in the spring. Good product, no drilling, no snaps, no velcro, no hassle!
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'93 CC 4x4 LE Cummins, 5spd, 4:10, Straight exhaust, 5th wheel, gooseneck, rear hitches, Lund visor w/lights, aluminum everything, Cobra 148GTL C. B.