This listing is for a thermostat housing kit for Mercruiser models with V8 454/502 CID Chevy Engines. P/N 13221 / GL13221. This kit replaces Mercruiser part numbers 16413A3 and 16413A9 (OEM: 90736A24). Kit includes the following parts: (1) 13520 - Thermostat Housing Assembly - OEM #90736A18
(1) 13236 - Tee Valve Assembly - OEM #22-98477A2
(1) 13710 - Cover - OEM #47442A1
(1) 13237 - Lifting Eye - OEM #12552
(1) 31460 - Gasket - OEM #27-47510
(1) 13250 - Thermostat Sleeve - OEM #23-47508
(1) 31631 - Thermostat Cover Gasket - OEM #27-41812-2
(1) 31560 - Gasket - OEM #27-53045-1
(2) 22376 - Screws - OEM #10-14164
(2) 21675 - Washers - OEM #12-20553
