Focus ST Engine Oil Cooler KitNEW DESIGN! When we set out to make an engine oil cooler kit for the Focus ST, we wanted to build a kit that would not only aid in engine oil cooling, but would maintain proper oil temperatures, and reduce engine coolant temperatures. We have accomplished this in our Engine Oil Cooler Kit for the Focus ST. If you track your ST, have a high horsepower build, or just push your car to the limit every drive, then the Damond Motorsports Engine Oil Cooler