Fleece Performance Coolant Bypass Kit With Stainless Steel Line For 03-07 5.9L Cummins With Manual Transmission mounts Steering correction components ensure proper

Steering correction components ensure proper post-lift handling

Raises boost without increasing turbine drivepressure

Although the Pro has much more raw output

Vehicle Type: 2-Door 4WD models only

2 Cylinder head gaskets

Fleece Performance Coolant Bypass Kit With Stainless Steel Line For 03-07 5.9L Cummins With Manual Transmission mounts Steering correction components ensure properThe 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