Adding this B&M SuperCooler keeps the ATF and transmission cooler, and keeping a vehicle's transmission cool is essential for dependability, especially in performance applications. The unit is designed to be very efficient for its size and weight, to cool much better than an ordinary 'fin and tube' cooler, and to reduce the risk of lube system failure. Using fluxless, oven brazed construction for vibration resistance, it is built out of lightweight aluminum alloy and features a revolutionary 'stacked plate' design with multiple oil flow paths. The unit monitors resistance to flow by allowing a controlled amount of ATF to pass through a self-regulating orifice. Controlled by viscosity, thicker ATF is returned directly to lube through two bypass openings in the stacked plate core, while thinner ATF is directed through the core to cool as operating temperatures increase.