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On ours, those studs were just rubber plugs into the mounting holes for the MaxxAir cover. Ours required no drilling or attachment to the roof. Brackets mounted on to the existing holes. Now I will say I installed our 6 years ago, so things may have changed.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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