Rebuilt Caterpillar 6NZ 550 HP High Performance Build – Complete Rebuild – 1 Year Unlimited Mile/Hour Warranty, Single-piece friction welded pistons, Premium diesel cast cylinder head, Block completely gone through with new lower block sleeve, coolant ports, and resurfaced machining, Crevice seal liners, Cryo-treated head bolts, Rebuilt rocker arms, Rebuilt Jake brakes, Vibratec vibration dampener, Full Tilt performance manifold, Polished crankshaft! New; rocker shafts, oil cooler, water pump, oil pump, air compressor, Spacer plate, starter, thermostats, wiring harnesses, turbocharger, fuel pump, bolts, nuts, and washers throughout, coolant hoses and lines, fuel hoses and line. Buyer Options: Oil pan configuration available as either front sump or rear sump depending on buyer application requirements. Customer Rebuilds these motors and can build one to your needs. Contact Ulmer Rep Devin for further Details. Located: Glen Ullin, ND