BedXTender HD installation kits are available to help complete and/or upgrade the install of your Sport, Max, or Moto BedXTender HD. Some specific models will require these kits for a proper and secure installation, while some will assist applications with tonneau covers and shells. These extras and options will help make your heavy-duty hauling BedXtender from Amp Research easy to use and efficient. PartNumber : amp74604-01A Description : BEDXTENDER HD KIT NPC : A NPD : Top 60% of Product Group Sales Value (Units x $, Hits, etc.) Title : BEDXTENDER HD? KIT Warranty : 3 Year Warranty WARNING CA Proposition 65 : No Truck Bed Accessories::Bed Bars