Cummins Coolant Bypass Kit 03-07 Manual Transmission w/ Stainless Steel Braided Line Fleece Performance CHEVROLET/GMC " trail-ready upgrade with Rough Country's

trail-ready upgrade with Rough Country's Front LED Bumper

Compatible with stock filter and able to reuse stock factory gasket

Part Number: 21C313

5-1/2" conical Pro 5R performance air filter for maximum flow

Cummins Coolant Bypass Kit 03-07 Manual Transmission w/ Stainless Steel Braided Line Fleece Performance CHEVROLET/GMC " trail-ready upgrade with Rough Country'sIncreased Coolant Flow, Decreased Coolant Temperatures. The rear cylinders on the 5. 9 6. 7L 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