Speedmaster Single Pass Transmission Oil Coolers are designed to provide you with maximum cooling efficiency without relying on direct airflow. This process produces a cooler and longer-lasting transmission, even in the toughest environments. Constructed from lightweight aluminum extrusion with welded ends, Speedmaster's single pass transmission coolers have a sleek and compact design that allows them to be mounted in several locations. Speedmaster offers these coolers in a variety of widths with .375 inch inlets, in your choice of blue, red or silver anodized finish.