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. Cat Reman cylinder blocks such as part # 20R5200 acts as the central frame of the engine and all the other engine components are attached to it. It's a chamber where fuel is combusted and power is generated. The Reman Cylinder Block is a core engine component that has been disassembled, inspected, cleaned, and remanufactured to original equipment manufacturer (OEM) specifications. Cat Reman Cylinder Blocks are facility remanufactured using genuine Cat parts and include all critical engineering updates, and is rigorously tested against original specifications, so you know you’re getting genuine Caterpillar reliability.Attributes:• You're buying less downtime and lower repair bills, helping you reduce owning and operating costs.• Cat Reman cylinder blocks provide like new performance and reliability at fraction-of-new costs with return of a qualifying core, while reducing the impact on the environment compared to buying new.• Cat Reman cylinder blocks are covered with a same-as-new, 12-month Caterpillar Limited Warranty 1 against Caterpillar defects in material and/or workmanship.• Cat Reman offers drop-in solution.1 Warranty can vary by model and application; limitations apply. For complete details about the applicable Caterpillar Limited Warranty, contact an authorized Cat dealer.