Tests have proven that a 20 degree drop in transmission fluid temperature can double the life of automatic transmission components. Cooler tranny oil gives more reliable, consistent shifts under racing conditions, and prevents transmission damage under extreme towing conditions. These coolers provide a reliable means of cooling your auto transmission. Cooler capacity is based on GVW rating. Select cooler size based on severity of service. Features: Multiple GVW ratings available Complete with all hardware, hose and fittings Easy-to-follow instructions in English, French & Spanish BILLET FITTINGS - Billet barbed fittings offer more secure hose connections HIGH EFFICIENCY TURBULATOR - Superior mixing:Pit Stop USA offers Flex-A-Lite Translife Transmission Cooler - 7-1/2" x 20" x 3/4" 4120 at low everyday prices. Be sure to check out all of our products from Flex-A-Lite including Flex-A-Lite Oil Coolers - Transmission.