Fleece Coolant Bypass Kit With Stainless Line For 03-07 Ram 5.9L Cummins Manual
The rear cylinders on the 5.9L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. 03-07 Ram 5.9L Cummins Manual. Fleece Coolant Bypass Kit With Stainless Line.