REQUIRED For Replacement labeled Engines, Long Blocks, and short blocks sold within the U.S. and U.S. Territories the engine core (i.e. old engine) that is removed MUST be returned to your selling Caterpillar dealer, so that they can return to Caterpillar OR destroy, as required by law. Proof of return or destruction will then be provided to the EPA and or California ARB if required. See PELJ1301 for additional details. Description:Cat® Primary Engine Arrangement is the vehicle's main source of power. Cat® Primary Engine Arrangements are designed to convert one form of energy into mechanical energy. This Cat® Engine Arrangement provides a C3.3 B compliant machine engine. The parts that are included in the arrangement are housing group, lifting group, air and fuel lines group, wiring group, nozzle group, piston group, pump group and cooler groups. Cat parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, and reuse.Application:Consult your owner’s manual or contact your local Cat Dealer for more information.