Coolant Bypass Kits

Increased 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...

The exhaust back pressure relocation Kit for 2007.5-2012 RAM w/ 6.7 Cummins will allow you to relocate the EBP sensor from the factory location on thermostat housing elbow to a new mounting block on...

Fleece Performance 2003-2016 Cummins Coolant Bypass Brackets (Set of Two)This Part Fits:YearMakeModelSubmodel2003,2005-2007DodgeRam 2500Laramie2003-2007Dodge

6.7L Cummins Thick Flange #12 JIC Male Fitting for Coolant Port Behind Water Pump. Press Fit Connection with High Temp O-Ring Seal and Mounting Bolt Tab.

6.7L Cummins Thin Flange #10 JIC Male Fitting for Coolant Port Behind Water Pump. Press Fit Connection with High Temp O-Ring Seal and Mounting Bolt Tab.

Universal preformed 5/8" hose with 90 degree ends and T-fitting (1" ID on the T). Create clean routings and installations with this preformed coolant hose. See graphic for hose lengths.

Complete kit to service your Fleece Performance Coolant Bypass - Includes all O-rings, fasteners, and a new thermostat. Two thermostats included to service all production years, you will only use one...

Billet Aluminum Black Anodized Coolant Plug for Duramax Engine Cover, for 1.1" bore. Includes high temperature silicone O-ring seal.

Replacement O-ring Kit for all Fleece Cummins Coolant Bypass Kits includes 3 new square cut O-rings, 1 new standard O-ring, and 2 new AN fitting O-rings. When used with MY94 - MY2002 kits, not all...