5.9L / 6.7L Diesel Cooling Upgrades
HPS Silicone Radiator Hoses Kit: Dodge Ram 2500 & 3500 6.7L Diesel 2010 - 2012
HPS
Regular price
$278.30
$242.00
13% off
- Unit price
- /per
3 colors
PPE Radiator Upper & Lower Coolant Hose Kit: Ram 2500 / 3500 2013-2014 6.7L Diesel
PPE
$329.99
- Unit price
- /per
Mishimoto Replacement Radiator Ram 2500 / 3500 2013-2018 6.7L Diesel
Mishimoto
Regular price
$326.00
$295.95
9% off
- Unit price
- /per
Mishimoto Perf Aluminum Radiator: Ram 2500/3500 2019-2024 6.7L Cummins Diesel
Mishimoto
Regular price
$1,155.00
$1,049.95
9% off
- Unit price
- /per
Mishimoto Transmission Cooler: Ram 2500/3500 2019-2024 6.7L Diesel/6.4L 392
Mishimoto
Regular price
$583.00
$529.95
9% off
- Unit price
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Mishimoto Thermal Bypass Valve: Ram 2500 / 3500 2019-2026 6.7L Diesel
Mishimoto
Regular price
$225.00
$204.95
9% off
- Unit price
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Mishimoto Silicone Coolant Hose Kit Red: Dodge Ram 2500 6.7L Diesel 2010
Mishimoto
Regular price
$271.00
$245.95
9% off
- Unit price
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Mishimoto Blue Silicone Radiator Hose Kit w/ Internal Spring: Dodge Ram 2500 2010 6.7L Diesel
Mishimoto
Regular price
$271.00
$245.95
9% off
- Unit price
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Mishimoto Transmission Cooler Tube-Fin: Dodge Ram 2500 / 3500 1994-2002 5.9L Diesel
Mishimoto
Regular price
$385.00
$349.95
9% off
- Unit price
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Mishimoto Aluminum Perf Radiator: Ram 2500 / 3500 1994-2002 5.9L Diesel
Mishimoto
Regular price
$990.00
$899.95
9% off
- Unit price
- /per
Mishimoto Transmission Cooler (Tube-Fin Core): Ram 2500 / 3500 2013-2014 6.7L Diesel
Mishimoto
Regular price
$605.00
$549.95
9% off
- Unit price
- /per
Mishimoto Aluminum Coolant Y-Pipe: Dodge Ram 2500 / 3500 2013-2014 6.7L Diesel
Mishimoto
Regular price
$71.00
$64.95
9% off
- Unit price
- /per
Mishimoto Silicone Radiator Hose Kit Red: Ram 2500 / 3500 2013-2014 6.7L Diesel
Mishimoto
Regular price
$363.00
$329.95
9% off
- Unit price
- /per
Mishimoto Silicone Radiator Hose Kit Black: Ram 2500 / 3500 2013-2014 6.7L Diesel
Mishimoto
Regular price
$363.00
$329.95
9% off
- Unit price
- /per
Mishimoto Silicone Radiator Hose Kit Blue: Ram 2500 / 3500 2013-2014 6.7L Diesel
Mishimoto
Regular price
$363.00
$329.95
9% off
- Unit price
- /per
Mishimoto Aluminum Degas Tank Natural: Ram 2500 / 3500 2013-2018 6.7L Diesel
Mishimoto
Regular price
$593.00
$538.95
9% off
- Unit price
- /per
Mishimoto Aluminum Perf Radiator: Ram 2500 / 3500 2013-2018 6.7L Diesel
Mishimoto
Regular price
$1,127.00
$1,024.95
9% off
- Unit price
- /per
Mishimoto Transmission Cooler (Tube-Fin Core): Ram 2500 / 3500 2015-2018 6.7L Diesel
Mishimoto
Regular price
$616.00
$559.95
9% off
- Unit price
- /per
Mishimoto Silicone Radiator Hose Kit Red: Ram 2500 / 3500 2015-2018 6.7L Diesel
Mishimoto
Regular price
$363.00
$329.95
9% off
- Unit price
- /per
Mishimoto Silicone Radiator Hose Kit Blue: Ram 2500 / 3500 2015-2018 6.7L Diesel
Mishimoto
Regular price
$363.00
$329.95
9% off
- Unit price
- /per
Mishimoto Silicone Radiator Hose Kit Black: Ram 2500 / 3500 2015-2018 6.7L Diesel
Mishimoto
Regular price
$363.00
$329.95
9% off
- Unit price
- /per
Mishimoto Thermal Bypass Valve Kit Billet Aluminum: Ram 2500 / 3500 2013-2018 6.7L Diesel
Mishimoto
Regular price
$110.00
$99.95
9% off
- Unit price
- /per
Mishimoto Thermal Bypass Valve Kit CNC Aluminum: Dodge Ram 2500 / 3500 2013-2018 6.7L Diesel
Mishimoto
Regular price
$225.00
$204.95
9% off
- Unit price
- /per
HPS Silicone Radiator Hoses Kit: Dodge Ram 5.9L Diesel & 6.7L Diesel 2003 - 2010
HPS
Regular price
$284.05
$247.00
13% off
- Unit price
- /per
3 colors
HPS Silicone Radiator Hoses Kit: Dodge Ram 5.9L Diesel 1999 - 2002
HPS
Regular price from $228.00 Up to 13% off
- Unit price
- /per
3 colors
HPS Hi Temp Reinforced Silicone Oil Cooler Hose Kit (BLACK): Fits Dodge Ram (03-06) w/ SS Clamps
HPS
$84.00
- Unit price
- /per
PPE Coolant Reroute Tube Polished SS: Dodge Ram 2500 / 3500 2003-2007 w/ Dual Fueler Kit
PPE
$299.99
- Unit price
- /per
Mishimoto Blue Silicone Hose Kit: Dodge Ram 2500/3500 5.9L/6.7L Diesel 2003-2010
Mishimoto
Regular price
$220.00
$199.95
9% off
- Unit price
- /per
Mishimoto Black Silicone Hose Kit: Dodge Ram 2500/3500 5.9L/6.7L Diesel 2003-2010
Mishimoto
Regular price
$220.00
$199.95
9% off
- Unit price
- /per
Mishimoto Top Heater Hose Upgrade: Dodge Ram 2500 / 3500 2008-2024 6.7L Diesel
Mishimoto
Regular price
$110.00
$99.95
9% off
- Unit price
- /per
Spec D Aluminum Radiator (3-Row): Dodge Ram 5.9L Diesel 1994 - 2002
Spec D
Regular price
$374.00
$277.00
26% off
- Unit price
- /per
Spec D Aluminum Radiator (2-Row): Dodge Ram 5.9L & 6.7L Diesel 2003 - 2009
Spec D
Regular price
$394.00
$292.00
26% off
- Unit price
- /per
PPE Lower Coolant Hose Kit 5mm 4-Ply Silicone: Dodge Ram 2003-2010 5.9L/6.7L Cummins
PPE
$99.99
- Unit price
- /per
PPE Upper Coolant Hose Kit 5mm 4-Ply Silicone: Dodge Ram 2003-2010 5.9L/6.7L Cummins
PPE
$99.99
- Unit price
- /per
PPE SS Heater Hose Connector: Dodge/Ram 6.7L Cummins / GM 6.6L Duramax 2007-2024 / 2017-2019
PPE
$24.99
- Unit price
- /per
PPE Silicone Coolant Hose Kit (Upper & Lower): Fits Ram 2010-2012 6.7L Cummins
PPE
$329.99
- Unit price
- /per
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Cooling Upgrades for 5.9L Magnum V8 and 6.7L Cummins Diesel Engines
The 5.9L Magnum V8 and 6.7L Cummins diesel engines are built for durability and heavy-duty performance, especially in towing applications. Upgrading the cooling system on these platforms is essential to maintain optimal operating temperatures and protect your engine during extended, high-load use.
How do cooling upgrades benefit the 5.9L Magnum and 6.7L Cummins?
Both engines generate significant heat under heavy towing and demanding conditions. Enhanced cooling components improve heat dissipation, helping prevent overheating and reducing engine wear. Proper cooling upgrades also support consistent performance and reliability, especially when your truck is under sustained load.
- High-capacity radiators increase coolant volume and heat exchange
- Upgraded fans improve airflow at low speeds and idle
- Thermostats optimized for diesel temperature ranges ensure better coolant flow
- Auxiliary cooling parts support turbocharged 6.7L Cummins under boost
What are key considerations when upgrading diesel cooling systems?
When selecting cooling upgrades for the 5.9L Magnum or 6.7L Cummins, focus on components designed specifically for diesel applications. Diesel engines run hotter and under higher torque loads than gasoline engines, so cooling parts must be robust and compatible with your engine’s cooling circuit. Proper fitment and quality materials are critical to ensure long-term durability and performance.
Find the right cooling upgrades for your 5.9L and 6.7L diesel at FastHemis
Whether you’re maintaining a classic 5.9L Magnum or maximizing the towing capability of your 6.7L Cummins, FastHemis offers cooling upgrades tailored to these engines. Browse our collection to find radiators, fans, thermostats, and auxiliary components engineered to keep your diesel running cooler and more reliably under load.