The trim level is where the money is
Year, Make and Model narrow a 2021 F-150 to a few hundred parts. Submodel is what takes it to the right one. XLT 4WD and Raptor share a nameplate and not much else. An app that stops at three levels hands the shopper a list and makes them do the last step themselves — which is the exact step they were unsure about when they arrived. ViewForge’s automotive template ships four cascading levels, and you can relabel the fourth to Engine or Trim if that is how your catalog thinks.