Tier 1 Power Tech Bore/Stroke: 4.17x5.00 inches (106x127mm). Output: 99-15HP@2500rpm. Aspiration: Turbocharged, no after cooling. Engine features: Reluctor ring, aux drive, dry bell house, three bolt rotary pump, cam driven lift pump, four bolt crank nose and rear downward mounted turbo. Mechanical. Test ran 11-19-16: "Running B" with 50-60 psi oil pressure. Starts and runs good but has multi colored smoke (high hour engine, may need some TLC). Selling as is. See it run on video. overhaul kits available.