1Applicable Model: The transmission cooler line kit is for 2500 3500 replacement for Cummins 5.9L 2003 to 2007. Please confirm whether it is consistent with the product you need. 2Perfect Replacement: The transmission cooler hose kit can be a perfect replacement, to allow you to get rid of the stock, rusty and leaky rigid steel lines. 3Practical Kit: This transmission oil cooler hose contains all three lines, lines from transmission to heat exchanger and from heat exchanger to factory cooler, and from cooler back to transmission, come with 4pcs transmission adapters. 4High Strength Structure: The transmission cooler line is made from premium steel, copper, plastic, nylon, which is rust resistant, can ensure long term use. 5Easy to Install: The transmission fluid cooler line kit has a simple installation, convenient and time saving, don't need too much tools or complicated steps.