Specification: Engine: Detroit Series 60 Horsepower: up to 500HP Displacement: 12.7L Highway Truck, Freightliner Part Numbers: 23528062, 23525463, 23528064, 23526016, 23522312, 172743, 172743, 172253, 23526272, 23522188, 23522189, 23529103 23526271, 23522190, 23526679, 23528059, 23528065.