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Mishimoto Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat
Mishimoto Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat
Mishimoto Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat
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Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat

Mishimoto
MISMMTS-RAM-94H
748354013931
Thermostats
20+ Units In Stock - Ships Next Business Day
$ 92.00 $ 83.95
$ 83.95

SKU: MMTS-RAM-94H | UPC: 748354013931

Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat 1994-1998 Ram 2500/3500

The Mishimoto high-temperature thermostat upgrades 1994-1998 Dodge Ram 2500 and 3500 trucks with 5.9L Cummins 12-valve engines. It opens at 221°F compared to stock 195°F to sustain higher coolant temperatures for improved turbocharger response and engine efficiency during performance driving. This direct-fit part prevents overcooling in modified Cummins engines while maintaining reliability.

Key Features

  • 221°F Opening Temperature: Raises optimal operating range to enhance combustion efficiency, reduce turbo lag, and support high-boost setups in 5.9L Cummins engines
  • CNC-Machined Aluminum Housing: Precision-engineered for strength and corrosion resistance, ensuring long-term durability under extreme diesel operating conditions
  • Stainless Steel Bellows and Spring: Provides consistent pressure and sealing for reliable operation across thousands of heat cycles
  • Direct OEM Replacement: Bolts into factory location on 1994-1998 Ram 5.9L Cummins with no modifications required
  • Includes Gasket and Bolts: Complete kit simplifies installation and prevents coolant leaks

Product Notes

  • Ideal for stock or tuned 12-valve Cummins engines seeking better thermal management
  • Pair with upgraded radiator or intercooler for maximum cooling system performance
  • Packaged weight 0.75 lbs, box dimensions 4 x 4 x 3 inches

Installation Notes

  • Professional installation recommended.
  • Drain coolant from radiator and block before removal to avoid spills
  • Torque mounting bolts to 106 in-lbs. compatible with factory water outlet housing

This Part Fits

Year Make Model Submodel
1994-1998 Dodge Ram 2500 Base
1994-1998 Dodge Ram 3500 Base
1994-1998 Dodge Ram 2500 Laramie
1994-1998 Dodge Ram 3500 Laramie
1997-1998 Dodge Ram 2500 ST
1997-1998 Dodge Ram 3500 ST

Why Choose Mishimoto?

  • Proven leader in cooling components for diesel trucks and performance vehicles
  • Direct-fit design tested for real-world Cummins applications
  • Lifetime warranty covers defects in materials and workmanship

Frequently Asked Questions

  • Q: Will this thermostat fit my 1994-1998 Dodge Ram 2500 5.9L Cummins?
    A: Yes, it is a direct replacement for all 12-valve 5.9L Cummins engines in 1994-1998 Ram 2500 and 3500 models, including Base, Laramie, and ST trims
  • Q: What materials are used in construction?
    A: Features CNC-machined aluminum housing with stainless steel bellows, spring, and brass pellet for corrosion resistance and precision operation
  • Q: What warranty applies and is installation difficult?
    A: Backed by Mishimoto Lifetime Warranty. Installation takes 30-60 minutes with basic tools. drain coolant first and follow torque specs

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Secure retail box 4 x 4 x 3 inches
  • Weight: 0.75 lbs

Request For Information

Have questions about Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat? Fill out the form below and we'll get back to you by the next business day.
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