A MaxxPro XL. The XL variant was elongated and had more stowage capacity than the base model. It could be easily configured for ambulance, command and control, or explosive ordnance disposal.
By far the most widely used MRAP is the International MaxxPro. Navistar International built MaxxPro variants for Category I and II (MaxxPro XL), although the majority of those fielded have been Category I models. The MaxxPro features a reinforced crew compartment with a V-shaped hull mounted onto an International Workstar 7000 chassis. With a composite armor shell developed by the Israeli Plasan company, the MaxxPro's armor was bolted together instead of welded. This facilitated quicker maintenance, exchange of parts, and the ability for Navistar to rapidly manufacture and field more vehicles.
When International first entered the competition, it submitted only two prototypes for the initial round of testing at Aberdeen Proving Ground, Maryland, in March 2007. Following this test, which included maneuver drills and explosives tolerance, Marine Corps Systems Command placed their first order for 1,200 of the Category I vehicle. Although the MaxxPro was larger than any other combat vehicle then in theater, the Pentagon appreciated its speed and survivability. By the end of 2007, the US Military had ordered a total of 4,471 MaxxPros.
After the initial success of its Category I model, Navistar International decided to push a Category II variant known simply as the MaxxPro XL. For making the leap to Category II, the XL differs only slightly from its Category I counterpart. The XL model carries a gross vehicle weight of up to 52,000lbs and has dual wheels at the rear to accommodate the additional tonnage. It also comes equipped with a 375 horsepower MaxxForce engine instead of the 330 horsepower DT350 used in the base model Category variant. Aside from these upgrades virtually identical to the Category I.
Throughout 2008, the MaxxPro was one of the few Category I MRAPs still receiving fresh orders to frontline units.
The MaxxPro's popularity continued to grow and, in September 2008, the Marine Corps awarded a $752 million contract (the most expensive contract awarded for an MRAP at the time) to Navistar International for a lighter and more mobile version of the MaxxPro. The result was the MaxxPro Dash. The Dash variant essentially took everything from the base model and scaled it down to mitigate the rollover hazard. It introduced a lower center of gravity, lower torque-to-weight ratio, and a smaller turning radius.
Since its first deliveries in 2007, there have been over 7,000 MaxxPro variants built, most of which have served in the Iraq War. In many ways, the MaxxPro has become the flagship of the MRAP program, featuring prominently in American news stories surrounding the "troop surge" and the drop in violence and IED attacks.