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Ensure reliable engine operation and prevent overheating with the Mishimoto Dodge 5.9L/6.7L Cummins High-Temperature Thermostat. Designed as a direct-fit replacement for your factory thermostat, this high-performance component is engineered to improve your cooling system's efficiency and durability. The Mishimoto thermostat features a higher activation temperature of 205°F, compared to the standard 190°F or 200°F units, allowing for longer coolant restriction and a faster engine warm-up, especially beneficial in cold climates. This enhancement helps maintain optimal engine temperature, reducing stress on internal components and prolonging engine life. Crafted with precision and backed by Mishimoto's Lifetime Warranty, this thermostat guarantees quality and reliable performance for your Dodge Ram trucks from 1999 to 2013, including various models equipped with 5.9L and 6.7L Cummins engines.
The installation process is straightforward, and the thermostat's durable construction ensures consistent temperature regulation over time. It is suitable for a range of Dodge Ram models, including 1500, 2500, and 3500 series, and is compatible with multiple transmission types such as NV3500, NV4500, 42RE, 45RFE, and 46RE. Proper cooling system function is critical for preventing engine overheating, especially under demanding conditions or in colder environments where quicker engine warm-up is advantageous. This high-temperature thermostat restricts coolant flow longer, which helps the engine reach operating temperature more quickly and maintain it effectively.
Manufactured with quality materials and precision engineering, the Mishimoto Dodge High-Temperature Thermostat is an essential upgrade for Dodge Ram owners seeking enhanced cooling system performance and longevity. It is an ideal choice for those operating in cooler climates or looking to improve overall engine reliability. As with all Mishimoto products, this thermostat is covered by a lifetime warranty, reflecting the company's commitment to quality and customer satisfaction. Invest in this durable and reliable thermostat to optimize your vehicle's cooling system and ensure long-term engine health.
Features:
Fitment:
1999 Dodge Ram 3500 Base
2000 Dodge Ram 3500 Base
2001 Dodge Ram 3500 Base
2002 Dodge Ram 3500 Base
2003 Dodge Ram 3500 Laramie
2003 Dodge Ram 3500 SLT
2003 Dodge Ram 3500 ST
2004 Dodge Ram 3500 Laramie
2004 Dodge Ram 3500 SLT
2004 Dodge Ram 3500 ST
2005 Dodge Ram 3500 Laramie
2005 Dodge Ram 3500 SLT
2005 Dodge Ram 3500 ST
2006 Dodge Ram 3500 Laramie
2006 Dodge Ram 3500 SLT
2006 Dodge Ram 3500 Sport
2006 Dodge Ram 3500 ST
2007 Dodge Ram 3500 Laramie
2007 Dodge Ram 3500 SLT
2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 ST
2007 Dodge Ram 3500 TRX4
2008 Dodge Ram 3500 Laramie
2008 Dodge Ram 3500 SLT
2008 Dodge Ram 3500 ST
2008 Dodge Ram 3500 SXT
2009 Dodge Ram 3500 Laramie
2009 Dodge Ram 3500 SLT
2009 Dodge Ram 3500 ST
2009 Dodge Ram 3500 SXT
2010 Dodge Ram 3500 Laramie
2010 Dodge Ram 3500 SLT
2010 Dodge Ram 3500 ST
2011 Ram 2500 Laramie
2011 Ram 2500 Laramie Longhorn
2011 Ram 2500 Power Wagon
2011 Ram 2500 SLT
2011 Ram 2500 ST
2012 Ram 2500 Laramie
2012 Ram 2500 Laramie Longhorn
2012 Ram 2500 Outdoorsman
2012 Ram 2500 Power Wagon
2012 Ram 2500 SLT
2012 Ram 2500 ST
2013 Ram 2500 Big Horn
2013 Ram 2500 Laramie
2013 Ram 2500 Laramie Longhorn
2013 Ram 2500 Lone Star
2013 Ram 2500 Outdoorsman
2013 Ram 2500 Power Wagon
2013 Ram 2500 SLT
2013 Ram 2500 ST
2013 Ram 2500 Tradesman
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
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Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
