No oil cooler yet. But I have been looking. Specifically at the RMS 'aftercooler', oil cooler, an evidently, they have a Dinan upgrade package that I may look at when the warranty expires. I think it is a larger pulley, belt, and reprogrammed software. Coky, do you also have a problem in the rain, I guess auqua lock from the filter getting wet? If so did you change filters, move it from just above the brake duct cut out where Dinan has it, or have you looked at some sort of bypass valve?