Bought this system new in box 6 months ago and recently bought a new truck and this is too small for the new truck. 

It was originally for a Tundra but was slight modified to fit a 2016 Ram 1500. Only two small areas along the sides of the bed were shaved down. My bed was the 5’-7”. 

Dims are 64” deep and the width varies from 66”-68”. The bed side profiles usually vary. They can be trimmed down if needed pretty easily