Transmission and engine oil coolers are an important part of any vehicle. Whether it’s your own body or your pickup’s engine, carrying extra weight takes extra energy, and extra energy creates additional heat. The danger in situations like these is overwork and overheating. Excessive heat breaks down lubricants, which in turn will damage your engine, and we all know that often leads to expensive repairs, or even worse, breakdowns. The same work/heat relationship holds true for your truck’s transmission, as well. The Summit engine oil cooler pictured here is a perfect example of an affordable and easy-to-install kit that takes oil from the pan, runs it through a special “sandwich” oil filter adapter, passes it through four 5⁄8-inch aluminum cooling tubes, then returns it to the adapter. From there, the cooled oil goes into the engine’s oil galleries. The coolers come with the sandwich filter adapter (for use with a Fram PH8A or equivalent filter), universal adapter bushings, ½-inch high-temperature/high-pressure hose, brass fittings, stainless steel hose clamps, mounting hardware and instructions.