INTRODUCTION - Dirt Series

H. Minimum tubing diameter and thickness is 1 ½ inch diameter by .095. This includes the front to back mid rail shoulder bar. I. Roll cage material must be DOM or 4130 chromoly. J. All tubing, welds, gussets, and roll cage construction must be approved by Dirt Series. K. Entire roof must be covered with sheet metal or .063 inch minimum aluminum. ................
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