The 4100 and 4400 SuperGlide hitches have the option of using either Universal Mounting Kits with fixed base rails or SuperRail Kits, with custom designed mounting brackets and totally removable SuperRails and Mounting Posts. Includes totally removable SuperRails and Posts, Mounting Brackets and Hardware. Fits both 4100 and 4400. For Models: Chevrolet: 2011-2012, 2500 and 3500.
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