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    Your automotive, industrial, and stationary engines can only be kept safe from overheating or overcooling when every component of your engine cooling system functions perfectly. Gates designs, tests, and manufactures our cap and thermostat solutions with OE equivalent or OE exact fit to keep your engine running strong. Gates caps & thermostats have long innovated the aftermarket, servicing a wide variety of passenger and heavy duty vehicles. Ensure your system maintains optimum engine temperature at maximum operational efficiency with Gates caps, thermostats, and system accessories.