Cat Reman valve lifters such as part # 11R-2387 also called tappets, follow an engine’s camshaft lobes to open and close intake and exhaust valves.Attributes:• Cat Reman New with Core (NWC) offerings contain 100% new Cat parts at a reduced price in exchange for a qualifying core.• Cat Reman NWC valve lifters offer the productivity and efficiency of new valve lifters for less than the cost of new with the return of a qualifying core.• Cat Reman valve lifters 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 ready solutions.1 Warranty can vary by model and application; limitations apply. For complete details about the applicable Caterpillar Limited Warranty, contact an authorized Cat dealer.