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All Protex Ultra Disc rotors are coated with an exclusive Ultracoat Z360® formula
zinc oxide and additional synthetic base oil that will resist temperatures of up to 1093°C
In the off position
semi synthetic
Dayco Thermostat DT81A Ultra-Select All Protex Ultra Disc rotorsDayco thermostats are designed to OEM specifications and come with a heat sensing wax filled copper power pill that detects the coolant temperature in the engine. The Dayco thermostat's amazing heat sensing power pill controls coolant flow from the radiator when the engine is cold to reach optimum operating temperature quickly. It then allows coolant to circulate through the engine when operating temperature is reached to create the perfect