the international prostar is a line of class 8 trucks that was manufactured by navistar international from 2006 to 2017. marking the introduction of the "-star" branding nomenclature to international, the conventional-cab prostar replaced the 9400i (and shorter 9200i). competing against the freightliner cascadia and the kenworth t2000/peterbilt 387, the prostar was an aerodynamically-enhanced conventional.