Mazdaspeed3 Engine Oil Cooler KitNEW DESIGN! When we set out to make an engine oil cooler kit for the Mazdaspeed3, 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 Mazdaspeed3. If you track your Mazdaspeed3, have a high horsepower build, or just push their car to the limit every drive, then the Damond Motorsports