There are three options for the mid-size International (Navistar) trucks known as Durastar, 4300, 4400 or MV’s that are model year 2004 through 2022.
Determining the correct Ex-Guard bracket kit is done by locating the location of the tow hooks, where they bolt to the truck. Also, whether the bumper is flush with the hood (most common) or extended 2″+ further than the hood.
Below are the three configurations and the corresponding bracket kit. You can download a PDF copy here.
