Engine: CAT 3126 inline 6 cylinder rated at 190hp Transmission: Allison automatic On board gas air compressor, roof air, bus air, 4-12 volt batteries with power converter, working lights, cabinets, shelving, sliding side door, stereo speakers, fans, power control panel, and rear power lift gate by Tommy Lift Gates. All six injectors on the engine were replaced. Runs very well.