Sierra International 18-2587 Power Steering Cooler Sierra Power Steering Cooler Power Steering Fluid: 4 GPM MAX; Water: 25 GPM max; Tube Bundle Overall Length: 6" or 152.4mm; Water Inlet and Outlet: 8" or 203.2mm, 1-1/4" or 31.8mm Sierra part number: 18-2587 Interchangeable with the following: Mercury 99356A2 Shipped bare metal, ready for primer and factory paint finish