Cummins Coolant Bypass Kit for 2003-2007 Manual Transmission w/ Stainless Steel Braided Line Engine Applicable:5.9L CUMMINS Fitment with throttle body spacer:

Fitment with throttle body spacer:

decreasing strain on the injection pump and supporting up to 800 hp

Silicone bellows coupling and quality stainless steel clamps for a secure install Price includes applicable core fee

Part Number: 59-81342

Stage-2's simple open-element design not only makes it super simple to maintain the air filter

Cummins Coolant Bypass Kit for 2003-2007 Manual Transmission w/ Stainless Steel Braided Line Engine Applicable:5.9L CUMMINS Fitment with throttle body spacer:The 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