When you're upgrading to a larger turbo or driving the car hard it is important keep the air charge as cool as possible. Even though the stock intercooler is able to flow sufficient air, it is still only designed for mild driving and stock power levels.
Whether you are looking for looks or performance, you can't beat the Process West Front Mount Kit. It installs perfectly on the front of your Focus with no cutting of any metal. The end tanks are upswept which allows for maximum flow distribution across the entire intercooler core. And let's face it, it looks better as well.
WARNING: Cancer and Reproductive Harm. (http://www.p65warnings.ca.gov)