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4-4 · Cut-throughs in pickup trucks are permitted in the Street Max, Super Street, and Extreme Divisions provided the enclosure and / or other equipment that is located in the bed of the truck does not extend above the sidewalls of the bed. If the pickup has a commercially available camper shell, then the sidewall restriction does not apply. Homemade camper shells are strictly prohibited.
6-9i · Modifications behind the B-Pillars may not extend above the plane that is used to determine compliance with the “wall test”