Dinan High Capacity Oil Cooler System - 2011-2013 BMW 335isThe BMW 335is comes from the factory with an auxiliary radiator smaller than a half sheet of paper. It will do little to keep the "limp mode" or heat soak away during a track day. The Dinan High Capacity Oil Cooler provides literally twice the volume of the stock unit, as well as 414 sq. in. of cooling tube vs. 112. 5, and that's really just the beginning. Nicely integrated inlet ducting provides greater airflow efficiencies and the ventilation of air