Used Detroit Diesel oil cooler assembly 5129421. Includes the housing, 16 plate cooler core and engine mounting plate. This cooler was removed from an 8V71 parts motor and has been in storage. Skippers Marine specializes in new old stock, recycled and those hard to find marine parts and accessories. Please check out my other Ebay store items. Don’t see what you are looking for? Feel free to send an email request. 6-0399