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The ARP thermostat housing bolt kit for GM Duramax LMM 6.6L engines includes stainless-steel 12-point fasteners specified for thermostat housing attachment. Offered as a street-style replacement kit, it aids coolant system repairs and reassembly by providing corrosion-resistant stainless construction and 12-point heads sized for factory-style tools to ensure accurate clamping of the housing.
ARP GM Duramax LMM 6.6L 12PT SS (street) thermostat housing bolt kit
