Cooling System

Water Pump Kit w/ Cover by Merchant Automotive®. Includes flywheel lock, all gaskets, and o-rings for installation. Seal between housing and gasket is installed. Bolts are torqued. Some existing hardware will be re-used. Build your ideal engine...

The Mishimoto Chevrolet Duramax low-temperature thermostats activate at a lower temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in warmer climates or use their trucks under heavy load or strenuous...

The Mishimoto Chevrolet Duramax high-temperature thermostats activate at a higher temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in colder climates or have trouble reaching operating temperatures...

A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 5.9L/6.7L cooling system with a Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat! This Cummins performance thermostat is...

2011-2016 LML Duramax Coolant Bypass Kit.Preformed rubber hose routes coolant from thermostat housing to firewall/heater core connection with pre-installed GM quick connect fitting. Billet aluminum anodized plug installs into rear engine cover coolant...

Aluminum Upper Coolant Pipe replaces the OEM rubber upper coolant hose and comes powder coated color of choice! For use with OEM GM radiator! Some aftermarket radiators may cause fitment issues!

Fleece Performance has built a reputation as one of the premier truck builders in the industry and strives to keep pushing the limits even higher. The Fleece Performance Engineering team is equipped with all the tools required to develop and test new...

Whether you're putting on an aftermarket turbo or deleting the EGR system on your LML, this coolant return plug will help you put the finishing touches on the job. . It comes complete with a high temperature silicone o-ring to ensure you won't have any...

Replace the water pump in your 2006-2016 GM 6.6L Duramax with the Merchant Automotive 10543 Water Pump Kit With Cover. This kit includes the flywheel lock, gaskets, and o-rings needed for installation.

Mishimoto's Duramax coolant hose kits are constructed from a combination of high-grade silicone and four layers of heat-resistant fibers to provide superior durability and increased pressure tolerance. Mishimoto is proud to release a silicone Duramax...

A leaking coolant hose can lead to serious engine damage if not quickly identified. Upgrade your Duramax cooling system with the Mishimoto 2011-2016 Chevrolet/GMC 6.6L Duramax LML Silicone Coolant Hose Kit for the perfect combination of...

Mishimoto has released a direct-fit performance aluminum radiator for the 2011-2016 Chevrolet/GMC 6.6L Duramax LML. Mishimoto performance radiators are manufactured from high-quality aircraft-grade aluminum with a 100% brazed aluminum core and polished...

The legendary reliability and power of the 6.7L Cummins equipped Dodge Ram has solidified it as one of the most popular trucks in the world for getting work done. But every legend has its weakness, and for the Dodge Ram, the stock radiator is one...

Mishimoto has released a Cummins performance aluminum radiator that's a direct fit for the 1994–2002 Dodge 5.9L Cummins. A Dodge Ram performance truck needs a cooling system that can keep up with the constant abuse of towing, hauling, and runs on...

Aluminum Upper Coolant Pipe replaces the OEM rubber upper coolant hose and comes powder coated color of choice! For use with OEM GM radiator! Some aftermarket radiators may cause fitment issues!

Fleece Performance has built a reputation as one of the premier truck builders in the industry and strives to keep pushing the limits even higher. The Fleece Performance Engineering team is equipped with all the tools required to develop and test new...

Fleece Performance has built a reputation as one of the premier truck builders in the industry and strives to keep pushing the limits even higher. The Fleece Performance Engineering team is equipped with all the tools required to develop and test new...

This is the extended upper radiator hose that is used in our 03-07 Dodge 5.9L Dual High Pressure Pump Kit. This custom radiator hose provides extra clearance for additional high pressure fuel pumps and other accessories that are mounted on the top/front...

It is commonly known that Ford 6.4L Powerstroke engines have extra solid particles left over from casting the engine which can clog your trucks factory oil cooler, EGR cooler, and other critical engine components. Mishimoto has released a...

Rubber is out, and silicone is in for your Duramax coolant hoses! A leaking coolant hose can lead to serious engine damage if not quickly identified. Upgrade your cooling system with the Mishimoto 6.6L Duramax silicone coolant hose kit for the...

Mishimoto engineers know you love your Ford, which is why we've developed a silicone coolant hose kit for your 2011–2016 Ford 6.7L Powerstroke. Our Mishimoto coolant hoses are constructed from a combination of high-grade silicone and...

Mishimoto is proud to expand their Cummins performance parts line to include the Mishimoto Dodge Ram radiator hoses for the 2003–2010 5.9L/6.7L Cummins are the perfect upgrade to the factory rubber Cummins coolant hoses. Mishimoto silicone Dodge Ram...

Mishimoto is proud to expand their Cummins performance line to include the 1994–1997 5.9L Cummins Silicone Coolant Hose Kit. Mishimoto Dodge Ram radiator hoses are the perfect upgrade for the factory Cummins coolant hoses. Mishimoto 5.9L Cummins radiator...

Mishimoto is proud to expand their Cummins performance line to include the 1998.5–2002 5.9L Cummins Silicone Coolant Hose Kit. Mishimoto Dodge Ram 5.9L Cummins coolant hoses are the ideal upgrade for the factory rubber hoses. We want you to get the...

Mishimoto has released a performance aluminum radiator for the 2001–2005 Chevrolet/GMC 6.6L Duramax. Mishimoto performance radiators are manufactured from high-quality aircraft-grade aluminum with a 100% aluminum core and polished end tanks. The...

Mishimoto has released a direct-fit performance aluminum radiator for the 2006–2010 Chevrolet/GMC 6.6L Duramax. Mishimoto performance radiators are manufactured from high-quality aircraft-grade aluminum with a 100% brazed aluminum core and...

Tired of constantly filling your 6.4L Powerstroke with coolant because you have a leaking radiator? The engineers at Mishimoto have been hard at work designing an all-aluminum 6.4L radiator to put an end to puddles of coolant under your truck...

Mishimoto engineers know you love your Cummins, which is why we've developed a line of Dodge Ram peformance parts, including a performance aluminum radiator for the Dodge 5.9L/6.7L Cummins engine. The Mishimoto performance aluminum radiator for...

A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 6.0L cooling system with a Mishimoto Ford 6.0L Powerstroke High-Temperature Thermostat and CNC Housing! This thermostat is designed as...

A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 6.0L cooling system with a Mishimoto Ford 6.0L Powerstroke Low-Temperature Thermostat and aluminum housing! This thermostat is...