Cheap junk. Does not fit a stock LS Thermostat
Installed on an LS3 Camaro water pump. Does not fit the thermostat, period. Tried a new thermostat, same issue. The ID of the housing is smaller than the stock GM housing. Had to grind several times to finally get a stock GM theromstat to seat into the housing. Then, went to bolt it up, and the bolt holes did not line up. They were off over 1/8 of an inch. Compared it to an L99 water pump, an LSA water pump, and an LS7 water pump. Same issue with them all. Finally made this work but for the hour of shop labor I wasted, it was not worth the headache.