Tigercat / Front Sump (Isol Pan 4898036), HMFO Turbo (4352378), Injector 5254261, Piston 4956007, 4376348 Rear Gear Hsg 5286982, Flywheel Hsg 5264554, Water Inlet 3943549/5260979, Air Inlet 5269920, Exh MFD 5263004, Valve Cover 5308945 Dual Oil Fill, Stiffener Plate 5290910, Fuel Filter 5303743/FF63009 . Reviva engines are a perfect aftermarket choice for diesel engine applications. All engines are made to the exact serial number of the existing engine which drives cost out of and simplifies the install process. Every Reviva engine is machined using state-of-the-art equipment and assembled using precise and repeatable methods. Reviva follows documented lean manufacturing processes and principles to create consistent quality and dependable outcomes. All drop-in engines are Dyno Tested, and all long block engines are SIM tested. All parts used are OE or OE equivalent, as well as OE specified, tested and validated prior to being accepted and approved for use by Reviva.