Genuine Volvo Penta piston ring set 875499. Possibly fits MD3 but this can’t be guaranteed. Please verify that this set is correct for your application before ordering. New old stock item in original packaging. 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. 6-9735