Billet 6061 aluminum thermostat housing fits all LT1/LT4 water pumps.
Designed to use factory type thermostats - Thermostat is NOT included.
Kit includes billet housing, OEM O-ring gasket, and (3) ARP stainless bolts.
*Not for use with OEM application as the extra port is not machined into this housing.
**Made in the USA by Rad Rides by Troy.