Sierra 18-3644 Mercruiser 160 Degree Thermostat KitSierra high-quality engine parts are designed to meet OEM specifications. Temperature rating: 160; Kit Includes: (1) 18-2553 Thermostat Cover Gasket; (1) 18-2917 Thermostat Gasket; (1) 18-3649 Thermostat; Application:Mercruiser Stern Drive 200 2 BBL GM 305; 1987-1987; s/n 0B525982 thru 0B774444; 230 4 BBL GM 305; 1987-1987; s/n 0B525982 thru 0B773739; 260 4 BBL GM; 1987-1987; s/n 0B525982 thru 0B773739; 260 GM 350; 1987-1987; s/n 0B525982 thru 0B773304; 5.0L 2 BBL GM 305; 1988-1995; s/n 0B774445 thru 0F600999; 5.0LX 4 BBL GM 305; 1988-1995; s/n 0B773740 thru 0F600999; 5.7L Competition Ski GM 350; 1987-1995; s/n 0B514627 thru 0F775199;