2 in. diameter standard oil cooler accepts 1 1/4 in. water hoses and 3/8 in. NPTF oil connections. 6 in. x 1 1/4 in. Oil Cooler | Seakamp Engineering 26134 Universal cooler fits many engine oil or transmission fluid cooling applications 6 in. core length 9 in. overall length 2 in. diameter 1 1/4 in. water hose connections 3/8 in. NPT oil connections 1/8 in. NPT water drain plug Copper core construction Recommended working pressure up to 150 psi Replaces Chrysler 3527778