COOLING SYSTEM
COOLING SYSTEM — 03–07 DODGE RAM 5.9L CUMMINS
Fitment: 2003–2007 Dodge/Ram 2500 & 3500 with 5.9L 24-valve common-rail Cummins. Keep ECTs stable while towing, daily driving, or sled-pulling with proven radiators, thermostats, water pumps, fan clutches, hoses, and coolant bypass solutions from CPP Diesel.
Popular Upgrades & Service Parts
- Radiators
Mishimoto Aluminum Performance Radiator (R2711-MT)
CSF 3710 OE-Replacement Radiator - Thermostats
Cummins 5292744 — 190°F OEM Thermostat
Cummins 5292742 — 180°F Thermostat (performance/towing)
Thermostat Category (including Mopar 05086739AB) - Water Pumps
Cummins 5473238 Genuine Water Pump
All Water Pumps - Fan Clutch & Controls
CPP 55056990AC Electronic Cooling Fan Clutch
Fan Clutch Connector Pigtail (68052582AB) - Hoses & Heater Lines
Dayco 72241 Lower Radiator Hose
Fleece Heater Core Replacement Hose & Fitting (FPE-CUMM-HCL-0324) - Coolant Bypass & Heat Exchanger Solutions
Fleece Coolant Bypass Kit — 2003–2005 Auto
Fleece Coolant Bypass Kit — 2006–2007 Auto
Fleece Coolant Bypass Kit — 2003–2007 Manual
Heat Exchanger Bypass Plug Kit (FPE-34382) - Sensors & Monitoring
Coolant Temperature Sensor (M-4954905)
Engine Parts (Thermostat, Oil Cooler, etc.) - Block/Frost Plug Solutions
Cummins 3928341 Thread-In Block Heater (category list)
BD “Killer” Rear Frost Plug Plate
CPP Common Rail Expansion Plug Kit
Why Upgrade Your 5.9L Cooling System?
- Towing & Workloads: Larger-core radiators and healthy fan control keep temps in check on long grades.
- Longevity: Fresh water pump, correct-temp thermostat, and quality hoses reduce hotspots and pressure spikes.
- Consistency: Coolant bypass kits stabilize rear-cylinder temps—great for tuned and hard-working trucks.
Frequently Asked Questions
Which thermostat temp should I choose?
Most stock trucks do well with the 190°F OEM thermostat. If you tow heavy or run performance tunes, the 180°F option can help smooth temperature swings.
Do I need a coolant bypass kit?
It’s a popular reliability mod on 5.9L trucks to equalize temps at the rear cylinders. Choose the kit matched to your model year and transmission: 03–05 Auto, 06–07 Auto, 03–07 Manual.
My fan clutch is acting up—what should I check?
The electronic fan clutches on these trucks fail with heat and age. Replace the clutch (CPP 55056990AC) and fix damaged wiring with the correct connector pigtail.
Which coolant should I run?
Use a high-quality antifreeze that meets OEM specifications for your model year and climate. Many owners use HOAT/G-05 type coolant—always verify with your owner’s manual.
What are common water pump failure signs?
Coolant weep at the pump, bearing noise, or temperature creep at idle/light load. If present, replace with a genuine Cummins pump.
Cold-weather starting tips?
A thread-in block heater helps winter starts and warm-up. See the 03–07 engine parts list for the 3928341 block heater and cord.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
FLEECE FPE-CUMM-CYL-M22-PG M22 THERMOSTAT PLUG FOR CUMMINS CYLINDER HEAD
FLEECE PERFORMANCE ENGINEERING
$15.99Replacement M22 thermostat plug for use on Cummins cylinder heads. Includes O-ring. Replaces Cummins part number 3089238. Warranty: 1 Year Limited Parts Warranty Fitment: 2003-2007 Dodge Ram 2500/3500 5.9L 24V Cummins 2007.5-2009 Dodge Ram 2500/3500 6...$15.99 -
FLEECE FPE-CUMM-HCL-0324 HEATER CORE REPLACEMENT HOSE AND FITTING FOR 2003-2024 RAM
FLEECE PERFORMANCE ENGINEERING
$69.99Eliminate the troublesome and leaky quick-connect heater core line on your 2003-2024 RAM with the latest OEM plus solution from Fleece Performance! Our stainless steel fitting and silicone hose kit are a direct replacement for the problematic stock hose...$69.99 -
FLEECE FPE-HAR-CUMM-CF-0312 2003-2012 CUMMINS COOLING FAN PIGTAIL
FLEECE PERFORMANCE ENGINEERING
$59.99Replacement connectors with 6 inch pigtail for use on the Cummins engine, this kit includes BOTH sides of the connector with flying leads to allow you to repair both sides when damaged by a broken serpentine belt. Produced in-house, our manufacturing...$59.99 -
FLEECE FPE-CUMM-TH-1318 REPLACEMENT THERMOSTAT HOUSING WITH AUXILIARY PORT RAM WITH 5.9L AND 6.7L CUMMINS
FLEECE PERFORMANCE ENGINEERING
$129.99The Fleece Performance replacement thermostat housing with auxiliary port is a direct replacement part for model years 1998.5-2007 RAM with 5.9L Cummins and 2013-2018 RAM with 6.7L Cummins. The auxiliary port is threaded to accept a -10AN (7/8 inch-14)...$129.99 -
FLEECE FPE-CLNTBYPS-HS-HC-0305 REPLACEMENT EPDM COOLAND BYPASS HOSE MY2003-2005
FLEECE PERFORMANCE ENGINEERING
$25.99Replacement EPDM hose for the Fleece Performance coolant bypass for model years 2003-2005 (Fleece part numbers FPE-CLNTBYPS-CUMMINS-0305 and FPE-CLNTBYPS-CUMMINS-0305-SS). Fits: 2003-2005 Dodge Ram 2500/3500 Upgrade your Dodge Ram's performance with the...$25.99 -
FLEECE FPE-CLNTBYPS-HS-HC-0607 REPLACEMENT EPDM COOLAND BYPASS HOSE MY2006-2007
FLEECE PERFORMANCE ENGINEERING
$27.99Replacement EPDM hose for the Fleece Performance coolant bypass for model years 2006-2007 (Fleece part numbers FPE-CLNTBYPS-CUMMINS-0607 and FPE-CLNTBYPS-CUMMINS-0607-SS). Fits: 2006-2007 Dodge Ram 2500/3500 Upgrade your cooling system with the FLEECE...$27.99 -
FLEECE FPE-34574-A UNIVERSAL PRE-FORMED 5/8 INCH COOLANT HOSE WITH 90 DEGREE ENDS
FLEECE PERFORMANCE ENGINEERING
$24.28Universal fit, preformed 5/8 inch ID hose with 90 degree ends. Create clean routings and installations with this preformed coolant hose. See graphic for detailed dimensions. Upgrade your vehicle's cooling system with the FLEECE FPE-34574-A Universal...$24.28 -
FLEECE FPE-34258-A UNIVERSAL PRE-FORMED 5/8 INCH COOLANT HOSE WITH 90 DEGREE ENDS AND T-FITTING (1 INCH ID ON THE T)
FLEECE PERFORMANCE ENGINEERING
$32.23Universal preformed 5/8 inch hose with 90 degree ends and T-fitting (1 inch ID on the T). Create clean routings and installations with this preformed coolant hose. See graphic for hose lengths. Experience seamless routing and installation with the...$32.23 -
FLEECE FPE-34257-A UNIVERSAL PRE-FORMED 5/8 INCH COOLANT HOSE WITH 90 DEGREE ENDS AND T-FITTING
FLEECE PERFORMANCE ENGINEERING
$28.84Universal preformed 5/8 inch hose with 90 degree ends and T-fitting. Create clean routings and installations with this preformed coolant hose.The FLEECE FPE-34257-A Universal Pre-formed Coolant Hose is designed to revolutionize your engine's cooling...$28.84 -
FLEECE FPE-34657-BLK-SPK 2003-2018 CUMMINS UPPER FAN PULLEY IDLER BLACK FINISH CONTRACT CUT
FLEECE PERFORMANCE ENGINEERING
$113.992003-2018 Cummins Upper Fan Pulley Idler ( Black Finish Contrast Cut )Revamp your engine's performance with the FLEECE FPE-34657-BLK-SPK Upper Fan Pulley Idler, expertly designed for 2003-2018 Cummins models. This premium idler pulley not only enhances...$113.99 -
FLEECE FPE-34658-BLK-SPK 2003-2018 UPPER FAN IDLER FOR USE WITH ELECTRIC WATER PUMPS BLACK FINISH CONTRACT CUT
FLEECE PERFORMANCE ENGINEERING
$113.99Billet aluminum upper fan idler for use with an electric water pump. Available in our custom spoke design and black anodized finish. Complete with bearing. 2003-2018 Electric Water Pump Upper Fan Idler (Black Finish Contrast Cut) Enhance your vehicle's...$113.99 -
FLEECE FPE-34659-AL 2013-2018 CUMMINS FAN DRIVE PULLEY BARE ALUMINUM FINISH FLEECE
FLEECE PERFORMANCE ENGINEERING
$85.49Fleece Performance billet aluminum fan drive pulley in bare aluminum finish for the 2013-2018 Cummins equipped RAM. Our pulley is a direct replacement for OE part number 5295226 and has an outside diameter of 6.329 inches.Features: 2013-2018 Cummins Fan...$85.49 -
FLEECE FPE-34660-AL 2003-2012 CUMMINS FAN DRIVE PULLEY BARE ALUMINUM FINISH
FLEECE PERFORMANCE ENGINEERING
$85.49Fleece Performance billet aluminum fan drive pulley in bare aluminum finish for the 2003-2012 Cummins equipped RAM. Our pulley is a direct replacement for OE part number 4930580 and has an outside diameter of 6.965 inches.Features: 2003-2012 Cummins Fan...$85.49 -
FLEECE FPE-34660-BLK 2003-2012 CUMMINS FAN DRIVE PULLEY BLACK FINISH
FLEECE PERFORMANCE ENGINEERING
$91.19Fleece Performance billet aluminum fan drive pulley in black anodized finish for the 2003-2012 Cummins equipped RAM. Our pulley is a direct replacement for OE part number 4930580 and has an outside diameter of 6.965 inches.Features: 2003-2012 Cummins...$91.19 -
FLEECE FPE-CLNTBYPS-HS-CRVP-BLK 34.5 INCH COMMON RAIL/VP44 CUMMINS COOLANT BYPASS HOSE BLACK NYLON BRAIDED
FLEECE PERFORMANCE ENGINEERING
$75.7634.5 inch Common Rail/VP44 Cummins Coolant Bypass Hose (Black Nylon Braided)The Fleece FPE-CLNTBYPS-HS-CRVP-BLK 34.5 Inch Common Rail/VP44 Cummins Coolant Bypass Hose is meticulously engineered for superior performance and durability, perfect for your...$75.76 -
FLEECE FPE-CLNTBYPS-HS-CRVP-SS 34.5 INCH COMMON RAIL/VP44 CUMMINS COOLANT BYPASS HOSE STAINLESS STEEL BRAIDED
FLEECE PERFORMANCE ENGINEERING
$75.76Replacement coolant bypass house with stainless steel braiding for our Common Rail/VP44 Cummins Coolant Bypass Kits. 34.5 inch Common Rail/VP44 Cummins Coolant Bypass Hose - Stainless Steel Braided For use with the following...$75.76 -
FLEECE FPE-CLNT-HS-BRKT 2003-2007 CUMMINS COOLANT BYPASS BRACKETS
FLEECE PERFORMANCE ENGINEERING
$69.992003-2007 Cummins Coolant Bypass Brackets (Set of two)Give your 2003-2007 Cummins engine the upgrade it deserves with the FLEECE FPE-CLNT-HS-BRKT Coolant Bypass Brackets. Designed for optimal performance, these brackets are essential for enhancing the...$69.99 -
BD DIESEL 1030607 UNIVERSAL ELECTRIC COOLING FAN KIT 80-WATT 10 INCH 800 CFM C/W UNIVERSIAL MOUNTING KIT
BD DIESEL
$83.9580-watt, 10-inch, 800 CFM universal electric fan. The fan is supplied as a pusher fan from factory which will draw air in through the grille of the fan and push that air into the radiator. This is ideal for installation on the front side of the vehicles...$83.95 -
BD DIESEL 1047137 COOLANT TUBE RELOCATION KIT HOWLER TURBO DODGE AUTOMATIC 2003-2005 5.9L CUMMINS
BD DIESEL
$186.95This supplemental install kit is designed for consumers that purchase a Howler Performance VGT Turbo Kit (PN: 1047139, 1047136, 1047140) and have a Dodge 5.9L Cummins 2003-2005 equipped with an automatic Tranmission. These trucks have a factory cooling...$186.95 -
BD DIESEL 1040023 CUMMINS KILLER FROST PLUG PLATE DODGE RAM 2003-2018 5.9L/6.7L CUMMINS
BD DIESEL
$66.95The coolant pressure inside the engine block can reach 70+psi at high rpm before the thermostat fully opens. This will cause a corroded frost plug to leak. The BD rear frost plug is able to be seal the leak without the need to hammer out the old frost...$66.95 -
BEANS DIESEL 211702 BILLET FAN PULLEY - FOR ELECTRIC FAN SETUP FOR 2003-2024 DODGE RAM WITH 5.9L/6.7L CUMMINS ENGINE
BEAN MACHINE
$164.95Bean Machine 03 to present Common Rail Cummins billet fan pulley for electric fan setup. Made in Tennessee, USA Features: -Billet aluminum Includes: -Fan Pulley -Bolts$164.95 -
INDUSTRIAL INJECTION 24FC10 DODGE COMMON RAIL IDLER PULLEY FOR CUMMINS SMOOTH BILLET
INDUSTRIAL INJECTION
$88.66Common Rail Cummins Smooth Billet Idler Pulley. Industrial Injection is the leading distributor, supplier and remanufacturer of diesel fuel systems, turbochargers, and engines. Your Top Choice for the top diesel products for On/Off highway, industrial,...$88.66 -
INDUSTRIAL INJECTION PDM-07003 DODGE SIDE FREEZE PLUG FOR 03-18 5.9L AND 6.7L CUMMINS
INDUSTRIAL INJECTION
$69.01Cummins 03-18 5.9L/6.7L CR Side Freeze Plug Side Freeze Plug Cummins Sold IndividuallyThe INDUSTRIAL INJECTION PDM-07003 DODGE SIDE FREEZE PLUG is a must-have component for your 2003-2018 Dodge Cummins 5.9L and 6.7L engines. Designed specifically to...$69.01 -
INDUSTRIAL INJECTION PDM-08203 DODGE FREEZE PLUG BACK PLATE PLUG FOR 03-18 CUMMINS
INDUSTRIAL INJECTION
$69.01Dodge Cummins 03-18 5.9L/6.7L Cr Freeze Plug Back Plate Plug (No O-Ring)Elevate the performance of your Dodge Cummins with the INDUSTRIAL INJECTION PDM-08203 DODGE FREEZE PLUG BACK PLATE PLUG. Designed specifically for the 2003-2018 Cummins 5.9L and 6.7L...$69.01 -
CPP BILLET REAR FREEZE PLUG BACK PLATE FOR 2003-2018 DODGE RAM WITH CUMMINS 5.9/6.7 ENGINE
CPP DIESEL
$69.95The CPP Billet Rear Freeze Plug Back Plate is expertly designed for Dodge Ram pickups equipped with Cummins 5.9L and 6.7L engines, specifically models from 2003 to 2018. This innovative component addresses a common issue faced by truck owners: freeze...$69.95 -
MOPAR 5179086AA RIGHT SIDE COOLANT TUBE CONNECTOR ELBOW FOR 03-07 DODGE WITH 5.9L CUMMINS ENGINE
MOPAR
$154.69The Mopar 5179086AA Coolant Tube Connector Elbow is an essential component tailored for the 2003-2007 Dodge models equipped with the robust 5.9L Cummins diesel engine. This high-quality part ensures your engine maintains its optimal performance and...$154.69 -
MOPAR 52027827 UPPER RADIATOR ISOLATOR MOUNT FOR 97-07 DODGE WITH 5.9L CUMMINS ENGINE
MOPAR
$43.74The Mopar 52027827 Upper Radiator Isolator Mount is a vital component designed specifically for 1997-2007 Dodge vehicles equipped with a 5.9L Cummins engine. This upper isolator is an essential part of the cooling system, designed to secure the radiator...$43.74 -
MOPAR 5011852AB COOLANT TEMPERATURE SENSOR FOR 01-24 DODGE RAM WITH 5.9L/6.7L CUMMINS ENGINE
MOPAR
$180.93The Mopar 5011852AB Coolant Temperature Sensor is an essential component designed specifically for 2001-2024 Dodge Ram models equipped with the powerful 5.9L and 6.7L Cummins diesel engines. This high-quality sensor offers incredible accuracy in...$180.93 -
CPP DIESEL FAN CLUTCH CONNECTOR PIGTAIL 2003-2012 RAM 2500/3500 WITH 5.9L/6.7L CUMMINS ENGINE
CPP DIESEL
$59.99The CPP-0310-FANCONN Fan Clutch Connector Pigtail is a crucial enhancement for the performance of specific Ram trucks equipped with the powerful 5.9L and 6.7L Cummins engines. Designed specifically for 2003-2009 Ram 2500/3500 models and 2008-2010...$59.99 -
CPP DIESEL RADIATOR DRAINCOCK VALVE FOR 1997-2009 DODGE RAM WITH CUMMINS 5.9L/6.7L ENGINE
CPP DIESEL
$31.19The CPP DIESEL 52028466AB Radiator Draincock Valve is an indispensable component for maintaining the cooling systems of select Dodge Ram and Jeep models. Specifically engineered for vehicles featuring 5.9L Cummins engines from 1997 to 2009 and 3.0L...$31.19 -
MOPAR 5086818AA COOLANT HOSE CONNECTOR FOR 03-05 DODGE WITH 5.9L CUMMINS ENGINE
MOPAR
$137.43The Mopar 5086818AA Coolant Hose Connector is a premier choice for maintaining peak performance in 2003-2005 Dodge trucks equipped with a 5.9L Cummins diesel engine. This essential automotive component is crafted by Mopar, a trusted name in the industry...$137.43 -
MOPAR 5179114AB 3.25" CABIN UPPER HEATER HOSE FOR 06-07 DODGE WITH 5.9L CUMMINS ENGINE
MOPAR
$120.24The Mopar 5179114AB 3.25" Cabin Upper Heater Hose is a vital component designed for 2006-2007 Dodge trucks equipped with the powerful 5.9L Cummins engine. Crafted with precision, this high-quality heater hose guarantees compatibility with vehicles that...$120.24 -
MAHLE C31858 COOLANT THERMOSTAT GASKET FOR 03-07 CUMMINS 5.9
MAHLE
$1.94Package Quantity 1 Item Grade OEM Standard Gasket Material Molded Rubber The MAHLE C31858 Coolant Thermostat Gasket is meticulously engineered to ensure optimal performance in 2003-2007 Dodge 5.9L Diesel engines. Designed to meet OEM standards,...$1.94 -
BOSTECH WP03302 WATER PUMP 2003-2007 DODGE 5.9L DIESEL
BOSTECH FUEL
$69.95Bostech's line of new heavy-duty water pumps are backed by our 24-month unlimited mileage warranty. We offer 50 plus skus covering most diesel engine applications. Our pumps are quality engineered according to the OEM's design and assembled with...$69.95 -
DORMAN 626-660 ENGINE HEATER HOSE ASSEMBLY (HEATER CORE TUBE L-SHAPE) (L-SHAPE) 2006-2009 RAM 5.9L/6.7L DIESEL
DORMAN
$151.36This HVAC heater pipe is designed to match the fit and function of the original pipe on specified applications, and is engineered for reliable performance and durability. Direct replacement - this HVAC heater pipe is designed to match the fit and...$151.36 -
DORMAN 54203 COOLANT RESERVOIR CAP 1990-2010 DODGE RAM
DORMAN
$16.43Cracked or lost the original engine coolant reservoir cap? Replace it seamlessly and effectively with this precisely engineered, direct replacement cap. Direct replacement - this engine coolant reservoir cap directly replaces a cracked or lost original...$16.43 -
DORMAN 626-321 HVAC HEATER CORE TUBE 2003-2005 DODGE 5.9L DIESEL
DORMAN
$155.01The DORMAN 626-321 HVAC Heater Core Tube for 2003-2005 Dodge 5.9L Diesel vehicles is a reliable and durable replacement part designed to restore the functionality of your heating and cooling system.Crafted to be a direct replacement, this HVAC heater...$155.01 -
DORMAN 54201 COOLANT RESERVOIR CAP 1994-2010 DODGE RAM 2500/3500 | 1990-1993 DODGE D/W 250/350
DORMAN
$9.72The DORMAN 54201 Coolant Reservoir Cap is the perfect solution for replacing a cracked or lost original cap on your 1994-2010 Dodge Ram 2500/3500 or 1990-1993 Dodge D/W 250/350. This precisely engineered cap is designed as a direct replacement, ensuring...$9.72 -
DORMAN 620-065 CLUTCH FAN BLADE 2003-2010 RAM 5.9L/6.7L DIESEL
DORMAN
$120.05The DORMAN 620-065 Clutch Fan Blade for the 2003-2010 RAM 5.9L/6.7L Diesel is the ultimate solution for replacing a damaged cooling fan blade efficiently. This vehicle-specific application is meticulously engineered to ensure a precise fit, seamlessly...$120.05 -
WEHRLI CUSTOM FAB WCF 100678 UPPER COOLANT PIPE 03-09 CUMMINS 6.7L
WEHRLI CUSTOM FABRICATION
$151.32The WEHRLI WCF 100678 UPPER COOLANT PIPE 03-09 CUMMINS 6.7L is a top-quality aluminum upper coolant pipe designed specifically for 2003-2009 5.9L & 6.7L Cummins engines. Say goodbye to your OEM rubber upper coolant hose and opt for this durable...$151.32 -
CPP DIESEL UNIVERSAL 10IN ELECTRIC 1750 CFM COOLING FAN KIT
CPP DIESEL
$89.95Enhance your vehicle's cooling system with the CPP Diesel 10-inch Electric Cooling Fan Kit, delivering a powerful and efficient solution for maintaining optimal engine temperatures. This versatile 80-watt fan is designed as a default "pusher" fan,...$89.95 -
CPP 3906698 WATER PUMP SEALING O-RING FOR 89-18 DODGE CUMMINS 5.9L/6.7L 12V/24V
CPP DIESEL
$6.29The CPP Diesel 3906698 Water Pump O-Ring/Seal is a high-quality sealing O-ring specifically designed for use with 1989-2018 Dodge Cummins 5.9L/6.7L 12V/24V engines. This essential component is crucial for maintaining the integrity and efficiency of your...$6.29 -
CPP WATER PUMP FOR 1989-2012 DODGE RAM WITH CUMMINS 5.9L/6.7L ENGINE
CPP DIESEL
$149.95The CPP-5473238 Water Pump Kit is a powerhouse solution for Dodge Ram owners seeking to optimize the cooling efficiency of their vehicles. Tailored specifically for models produced between 1989 and 2012 that feature the robust Cummins 5.9L and 6.7L...$149.95 -
MISHIMOTO MMFAN-CNTL-U18NPT ADJUSTABLE FAN CONTROLLER KIT
MISHIMOTO
$95.95The Mishimoto Adjustable Fan Controller Kit is an essential upgrade for anyone seeking optimal performance from their vehicle's cooling system. Specifically designed for cars equipped with 12v electric fans, this versatile kit ensures you maintain...$95.95 -
INTERSTATE MCBEE M-4954905 COOLANT TEMPERATURE SENSOR FOR 98.5-18 CUMMINS 5.9L/6.7L
INTERSTATE MCBEE
$32.99Enhance the performance and reliability of your Dodge Ram with the Interstate McBee Coolant Temperature Sensor, specifically designed for the Cummins 5.9L and 6.7L engines. This high-quality sensor is compatible with a range of model years from 1998.5 to...$32.99 -
INTERSTATE MCBEE M-3906698 WATER PUMP O-RING SEAL FOR 89-18 CUMMINS 5.9L/6.7L
INTERSTATE MCBEE
$2.49YEAR: 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2007.5, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 MAKE: Dodge Ram ENGINE: Cummins 5.9L, 6.7L, 12v, 24v$2.49 -
MISHIMOTO MMRA-LC LIQUID CHILL® RADIATOR COOLANT ADDITIVE
MISHIMOTO
$22.95Mishimoto Liquid Chill® radiator coolant additive is a simple yet effective way to reduce engine temperatures. This additive is compatible with all coolant types and does not require mixing. Mishimoto Liquid Chill® is proven to reduce engine...$22.95 -
CUMMINS 3905401 | GENUINE OEM EXPANSION PLUG (SIDE) | FITS 2003-2018 DODGE RAM 5.9L & 6.7L CUMMINS
CUMMINS
$10.05CUMMINS 3905401 | GENUINE OEM EXPANSION PLUG (SIDE) | FITS 2003-2018 DODGE RAM 5.9L & 6.7L CUMMINS The Cummins 3905401 GENUINE OEM EXPANSION PLUG (SIDE) is a genuine OEM replacement designed for Dodge Ram Cummins trucks. Function & Purpose...$10.05 -
MISHIMOTO MMTS-RAM-99L LOW-TEMPERATURE THERMOSTAT 1999-2013 CUMMINS 5.9L/6.7L
MISHIMOTO
$83.95The Mishimoto MMTS-RAM-99L Low-Temperature Thermostat is your solution to a reliable and efficient cooling system for your 1999-2013 Dodge Ram with a Cummins 5.9L/6.7L engine. Engineered as a direct-fit replacement for your factory thermostat, this...$83.95 -
MISHIMOTO MMTS-RAM-99H HIGH-TEMPERATURE THERMOSTAT 1999-2013 CUMMINS 5.9L/6.7L
MISHIMOTO
$86.95The MISHIMOTO MMTS-RAM-99H High-Temperature Thermostat is a crucial upgrade for your 1999-2013 Cummins 5.9L/6.7L engine. Engine overheating can lead to severe internal damage, which is why investing in a reliable thermostat is essential. This performance...$86.95 -
MISHIMOTO MMFAN-MOUNT Electric Fan Mounting Kit
MISHIMOTO
$15.95The Mishimoto universal fan mount kit is used to mount a Mishimoto to any Mishimoto aluminum radiator.Great for custom applications, the Mishimoto fan can be mounted in any convenient position on the radiator. Universal fan mount fits any Mishimoto...$15.95 -
MISHIMOTO MMFAN-8 Slim Electric Fan 8 inch
MISHIMOTO
$78.95The Mishimoto MMFAN-8 Slim Electric Fan 8 inch is a high-performance cooling solution designed to enhance the efficiency of your vehicle's cooling system. Whether you're looking for an upgrade to your OEM fan or dealing with fitment issues related to...$78.95 -
MISHIMOTO MMFAN-16 Slim Electric Fan 16 inch
MISHIMOTO
$115.95The MISHIMOTO MMFAN-16 Slim Electric Fan 16 inch is a high-performance cooling solution designed to optimize your vehicle's cooling system. Whether you are looking to enhance your vehicle's cooling efficiency or seeking a solution for fitment issues with...$115.95 -
MISHIMOTO MMFAN-14 Slim Electric Fan 14 inch
MISHIMOTO
$100.95The MISHIMOTO MMFAN-14 Slim Electric Fan 14 inch is a powerful cooling solution designed to enhance your vehicle's performance. This high-flow fan delivers an impressive 1300 cfm of airflow, ensuring efficient cooling to keep your engine running smoothly...$100.95 -
MISHIMOTO MMFAN-12HD Race Line High-Flow Fan 12 inch
MISHIMOTO
$184.95The MISHIMOTO MMFAN-12HD Race Line High-Flow Fan in 12 inches is the ultimate solution to maximize airflow to your radiator. Engineered specifically for heavy-duty applications, this fan outperforms standard Slim Line fans with ease. Despite its robust...$184.95 -
MISHIMOTO MMFAN-12 Slim Electric Fan 12 inch
MISHIMOTO
$93.95The Mishimoto MMFAN-12 Slim Electric Fan 12 inch is the perfect solution for upgrading your OEM fan and enhancing your vehicle's cooling system. Engineered to deliver superior performance, this high-flow fan provides an impressive 1150 cfm of airflow,...$93.95 -
MISHIMOTO MMFAN-11HD Race Line High-Flow Fan 11 inch
MISHIMOTO
$165.95The MISHIMOTO MMFAN-11HD Race Line High-Flow Fan, 11 inches in diameter, is the ultimate solution to provide your radiator with optimal airflow. This specially designed fan is part of our Race Line series, built to tackle heavy-duty applications that...$165.95 -
MISHIMOTO MMFAN-10HD Race Line High-Flow Fan 10 inch
MISHIMOTO
$157.95Enhance the cooling efficiency of your radiator with the MISHIMOTO MMFAN-10HD Race Line High-Flow Fan, a top-tier solution for heavy-duty applications. This 10" fan is engineered to deliver maximum airflow, providing an impressive 1600 CFM to cool even...$157.95 -
MISHIMOTO MMFAN-10 Slim Electric Fan 10 inch
MISHIMOTO
$88.95The MISHIMOTO MMFAN-10 Slim Electric Fan 10 inch is the reliable solution for upgrading your vehicle's cooling system. This high-flow fan offers a substantial 950 cfm of airflow, ensuring efficient cooling performance for your engine. Whether you're...$88.95 -
CPP COMMONRAIL EXPANSION PLUG KIT FOR 2003-2018 CUMMINS 5.9L AND 6.7L ENGINE
CPP DIESEL
$149.95Ideal for Cummins 5.9L and 6.7L engines from 2003 to 2018, the CPP Freeze Plug Kit Common Rail is a top-quality replacement part that ensures optimal engine performance. Designed with precision and accuracy, this freeze plug set offers OEM quality you...$149.95 -
CPP CUMMINS 3941981 WATER PUMP MOUNTING BOLTS FOR 89-18 DODGE CUMMINS 5.9L/6.7L 12V/24V
CPP DIESEL
$13.99Enhance the performance of your Cummins engine with the CPP Diesel Cummins 3941981 Water Pump Mounting Bolts. This set of two bolts is specifically designed to provide a secure and durable attachment for your water pump, ensuring optimal functionality of...$13.99 -
CUMMINS 4938189 | GENUINE OEM EXPANSION PLUG | FITS 2003-2018 DODGE RAM 5.9L & 6.7L CUMMINS
CUMMINS
$11.16CUMMINS 4938189 | GENUINE OEM EXPANSION PLUG | FITS 2003-2018 DODGE RAM 5.9L & 6.7L CUMMINS The Cummins 4938189 GENUINE OEM EXPANSION PLUG is a genuine OEM replacement designed for Dodge Ram Cummins trucks. Function & Purpose Engineered to restore...$11.16 -
CUMMINS 3975628 | GENUINE OEM ENGINE BLOCK HEATER ELEMENT | FITS 1998-2007 DODGE RAM 5.9L CUMMINS
CUMMINS
$74.64CUMMINS 3975628 | GENUINE OEM ENGINE BLOCK HEATER ELEMENT | FITS 1998-2007 DODGE RAM 5.9L CUMMINS The Cummins 3975628 GENUINE OEM ENGINE BLOCK HEATER ELEMENT is a genuine OEM replacement designed for Dodge Ram Cummins trucks. Function & Purpose...$74.64 -
CUMMINS 3943300 GENUINE OEM WATER OUTLET CONNECTION | 2003-2009 DODGE RAM 5.9L & 6.7L CUMMINS DIESEL
CUMMINS
$82.61CUMMINS 3943300 GENUINE OEM WATER OUTLET CONNECTION FOR 2003-2009 DODGE RAM 5.9L & 6.7L CUMMINS The Cummins 3943300 water outlet connection is a genuine OEM replacement for the 2003-2009 Dodge Ram 2500 & 3500 trucks with 5.9L or 6.7L Cummins...$82.61 -
CUMMINS 3906698 OEM WATER PUMP RECTANGULAR RING SEAL – 5.9L/6.7L (1989–2018)
CUMMINS
$7.27Cummins 3906698 — Genuine Water Pump Rectangular Ring Seal for 5.9L & 6.7L MPN: 3906698 | Also Known As: rectangular ring seal, water pump seal | Type: Pump-to-block sealing ring Genuine Cummins rectangular ring seal...$7.27 -
CUMMINS 4897224 OEM COOLANT TEMPERATURE SENSOR – ISB 5.9L (2003–2004)
CUMMINS
$70.65Cummins 4897224 — Genuine Coolant Temperature (ECT) Sensor for ISB 5.9L MPN: 4897224 | Also Known As: engine coolant temperature sensor, ECT, temp sender | Cross-Refs (ID only): Bosch 0281002471, Ford BG5X10884AA, Iveco...$70.65 -
CUMMINS 5292744 OEM 190° THERMOSTAT – 5.9L ISB (2003–2007)
CUMMINS
$92.93Cummins 5292744 — Genuine 190° Engine Coolant Thermostat for 5.9L ISB MPN: 5292744 | Also Known As: 190-degree thermostat, coolant thermostat | Cross-Ref (ID): Mopar 5086739AB (service number) Return your third-gen...$92.93 -
CUMMINS 5292742 OEM 180° THERMOSTAT – 5.9L ISB (1998.5–2007) | 4BT
CUMMINS
$74.03Cummins 5292742 — Genuine 180° Engine Coolant Thermostat for 5.9L ISB MPN: 5292742 | Also Known As: 180-degree thermostat, coolant thermostat | Related: 5292744 (190° OE-temp alternative), Mopar 5086739AB...$74.03