Gentlemen, "Stant" your engines. A subsidiary of Tomkins PLC's Gates Group, Stant manufactures a broad line of automotive parts and tools. The company produces fuel, radiator, and oil filler caps as well as gaskets and seals. Other products include thermal products such as heaters, thermostats and thermostat housings. The company also makes testers used to measure radiator cap pressure, fuel cap leakage compliance, and engine vacuum pressure. Stant sells to automakers and aftermarket retailers.