The Hayden Automotive Internal Pressure By-Pass Coolers, Nos. 696, 697, 698 and 699, allow the vehicle’s transmission to reach optimum operating temperature quickly by routing the fluid around the by-pass channel of the cooler until the fluid temperature increases. The patented design help vehicles in colder climates reach proper operating temperatures faster, which improves fuel economy and helps reduce friction of internal components, according to the company. It incorporates an integrated valve that eliminates the need for external valves and additional plumbing at installation. The item is available in four sizes to fit a wide range of applicationss. The cooler brackets come pre-drilled for easy mounting and include all hardware necessary for installation.