FridayParts Oil Cooler 2892304 Replacement for Cummins X15 ISX15 ISX Engine - Heavy Duty Truck Cooling System Part for Improved Engine Performance & Longevity

This part is aftermarket but made of stainless steel and copper core. Comes with O-rings and oil inlet/outlets are plugged to help prevent corrosion. Exact fit for core to housing, but this one is approximately 1/8” taller than OEM. I was worried cores would be too deep to mount in block, but everything went together flawlessly. Make sure gaskets/connector tube/cores are aligned (twin core) and use high temp/strength loctite on core bolts or you WILL leak coolant.