Fleece Performance Coolant Bypass Kit With Stainless Steel Line For 03-07 5.9L Cummins With Manual Transmission mounts Vehicle Type: 2-Door 4WD models

Vehicle Type: 2-Door 4WD models only

2 Cylinder head gaskets

Although the Pro has much more raw output

Raises boost without increasing turbine drivepressure

Fleece Performance Coolant Bypass Kit With Stainless Steel Line For 03-07 5.9L Cummins With Manual Transmission mounts Vehicle Type: 2-Door 4WD modelsThe rear cylinders on the 5. 9L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature