Engine Oil Cooler - BoxsterS through '04 and 996. This is THE oil cooler utilized on 2.5l cars as an upgrade LEGAL for BoxsterSpec. This cooler is nearly DOUBLE the capacity over the stock cooler (VISIT THIS LINK for pictures) Some cars will not have the extra return line fitting on their stock cooler. BRAG also suggest putting a small piece of rubber on the lip of cooler to keep it from rubbing on the bottom of the intake plenum.