I have a 6 foot ARE MX Series bed topper/camper and the 54” tracks fit perfectly with my roof! Make sure you measure a million and one times when installing everything. I'm very pleased with my roof rack system. All included: SL Adapter for the HD cross bars, 60” HD cross bars, Skyline Towers, Landing pad 1 (2 needed), 54” tracks and capnuts (sealant is included with the tracks).
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