Billet Specialties BLK90900 - Thermostat Housing -16 An Straight-Out LS Appl Black

Running Braided Line for your cooling system? No problem with Billet Specialties Thermostat Housings for LS. Engineered to provide optimum coolant flow and provide leak-free precision attachment of your cooling lines at a great price. Features: - Precision Machined from 6061-T6 Billet Aluminum - Stainless hardware included. - Available in -16 and -20 sizes. - Select from Machined or Black Anodized Finish. - Accepts OEM LS two-piece style thermostat and seal. - Includes O-Ring for use without a thermostat. - Includes 2- M6 X1.0 X 16mm stainless socket head cap screws for installation. - Made in the USA. The hole diameter in the pump will be 1.875-1.885" (1 - 7/8") Requires use of the following thermostats: - AC Delco LS Thermostat P/N 1311056 and P/N 131169 thermostat seal 187 degrees - Gates Thermostat P/N 34812 (includes seal) 187 degrees - Stant Thermostat P/N 14948 (includes seal) 187 degrees Will not fit early water pumps 97-03 that have a one piece thermostat housing. (thermostat is locked into housing with aluminum tabs on each side) The hole diameter in the pump is 2.052" (2 - 1/16") Installing this housing on older style pump will result in leaks. Fits: GM LS series water pumps that utilize a separate thermostat and water neck housing Edelbrock LS Water Pumps