2008 International ProStar with Sleeper Unit;. 2009 International ProStar Submodel: Pro LA617; Engine: 14.9L L6; EngineCode: ISX 15.0; FuelSystem: MFI; with Sleeper Unit;. 2009 International ProStar Submodel: Pro LA617; Engine: 15L; EngineCode: Signature 600; with Sleeper Unit;.