ARP 134-7401 12-Point Thermostat Housing Bolt Kit for Chevy LS1/LS2 Description: LS1 LS2 12pt thermostat housing bolt kit Pkg: kit Pkg Type: skin Material_1: 8740 chrome moly Finish_1: black oxide Material_2: N/A Finish_2: N/A Origin: USA Category: Intake System Product Line: Thermostat Housing Kit Type: Bolt