Fleece Performance Coolant Bypass Kit
2007–2012 Dodge Ram 2500/3500 5.9L & 6.7L Diesel
Part #: FPE-CLNTBYPS-CUMMINS-0712
Overview
The Fleece Performance Coolant Bypass Kit is engineered specifically for Dodge Ram 2500 and 3500 trucks equipped with the 5.9L and 6.7L Cummins diesel engines from 2007 through 2012. Designed to address a critical cooling system weakness, this kit improves coolant flow to the rear cylinders of the 6.7L Cummins engine, which are prone to overheating due to insufficient coolant circulation. By integrating a secondary thermostat that operates based on temperature rather than pressure, the kit ensures consistent coolant temperatures across all cylinders, preventing excessive pressure buildup and potential freeze plug failures.
This coolant bypass solution is essential for owners seeking to enhance the reliability and longevity of their Cummins-powered Ram trucks, especially under demanding driving conditions or heavy-duty use.
Key Features
The Fleece Performance Coolant Bypass Kit offers a range of benefits that directly improve engine cooling efficiency and durability:
- Increases coolant flow to the rear cylinders of the 6.7L Cummins engine
- Reduces coolant temperatures, preventing hot spots and overheating
- Maintains consistent coolant temperature across all six cylinders
- Prevents damaging pressure buildup in the cooling system
- Features a secondary thermostat that activates based on temperature, not pressure
- Includes braided nylon coolant hose with high-temperature protective sleeve
- AN O-ring fittings ensure a secure, leak-free installation
- OE-style fit and finish for seamless integration with factory components
- Helps prevent freeze plug failures and costly engine damage
Construction & Design
Fleece Performance designed this coolant bypass kit with durability and precision in mind. The kit includes high-quality braided nylon hose wrapped in a protective high-temperature sleeve to withstand the harsh environment of the engine bay. AN O-ring fittings provide a reliable, leak-proof seal that resists coolant loss and pressure fluctuations. The thermostat housings are engineered to match OE specifications, ensuring a perfect fit and easy installation without modifications. Additionally, new EGR crossover tube gaskets are included to maintain proper sealing and prevent leaks.
Installation & Fitment
The Fleece Performance Coolant Bypass Kit is a direct-fit upgrade for the following vehicles:
- 2007 Dodge Ram 2500 and 3500 with 5.9L Diesel
- 2008–2010 Dodge Ram 2500 with 6.7L Diesel
- 2008–2009 Dodge Ram 3500 with 6.7L Diesel
- 2011–2012 Ram 2500 and 3500 with 6.7L Diesel
Installation is straightforward for anyone with basic mechanical skills and common hand tools. The kit replaces factory components and requires no permanent modifications. All necessary mounting hardware and fittings are included to ensure a smooth, leak-free installation process.
What's Included
- Rear coolant bypass thermostat housing
- Front coolant bypass thermostat housing
- New EGR crossover tube gaskets
- Braided nylon coolant bypass hose with high-temperature protective sleeve
- AN O-ring fittings for secure connections
- Exhaust back pressure sensor mounting block
- Back pressure sensor line
- Mounting hardware
Ideal For
This coolant bypass kit is ideal for Dodge Ram owners who want to improve the cooling efficiency and reliability of their 5.9L or 6.7L Cummins diesel engines. It is especially recommended for trucks used in heavy towing, hauling, or off-road applications where engine temperatures can rise significantly. By preventing coolant temperature imbalances and pressure-related failures, this kit helps protect your investment and keeps your Cummins running strong for the long haul.
Fleece Performance Engineering is a diesel performance manufacturer known for innovative upgrades and reliability-focused solutions for Cummins, Duramax, and Power Stroke platforms. From turbo and fuel system components to cooling and electrical repair solutions, Fleece parts are built for owners who demand stronger performance without compromising dependability.
Fleece Perf Coolant Bypass Kit: Dodge/Ram 2500/3500 5.9L/6.7L Diesel 2007-2012
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FPE-CLNTBYPS-CUMMINS-07-12 Fleece Performance 07-12 Dodge Ram 2500/3500 5.9L/6.7L Diesel Coolant Bypass Kit. This coolant bypass kit improves reliability by increasing coolant flow and lowering temperatures at the rear cylinders of the 6.7L Cummins engine. Featuring a secondary thermostat that operates based on temperature, it prevents pressure buildup and freeze plug failures. The complete kit includes braided hose, AN O-ring fittings, and all necessary hardware for a leak-free, OE-quality installation, ensuring consistent cooling and enhanced engine longevity.
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Fleece Performance Coolant Bypass Kit
2007–2012 Dodge Ram 2500/3500 5.9L & 6.7L Diesel
Part #: FPE-CLNTBYPS-CUMMINS-0712
Overview
The Fleece Performance Coolant Bypass Kit is engineered specifically for Dodge Ram 2500 and 3500 trucks equipped with the 5.9L and 6.7L Cummins diesel engines from 2007 through 2012. Designed to address a critical cooling system weakness, this kit improves coolant flow to the rear cylinders of the 6.7L Cummins engine, which are prone to overheating due to insufficient coolant circulation. By integrating a secondary thermostat that operates based on temperature rather than pressure, the kit ensures consistent coolant temperatures across all cylinders, preventing excessive pressure buildup and potential freeze plug failures.
This coolant bypass solution is essential for owners seeking to enhance the reliability and longevity of their Cummins-powered Ram trucks, especially under demanding driving conditions or heavy-duty use.
Key Features
The Fleece Performance Coolant Bypass Kit offers a range of benefits that directly improve engine cooling efficiency and durability:
- Increases coolant flow to the rear cylinders of the 6.7L Cummins engine
- Reduces coolant temperatures, preventing hot spots and overheating
- Maintains consistent coolant temperature across all six cylinders
- Prevents damaging pressure buildup in the cooling system
- Features a secondary thermostat that activates based on temperature, not pressure
- Includes braided nylon coolant hose with high-temperature protective sleeve
- AN O-ring fittings ensure a secure, leak-free installation
- OE-style fit and finish for seamless integration with factory components
- Helps prevent freeze plug failures and costly engine damage
Construction & Design
Fleece Performance designed this coolant bypass kit with durability and precision in mind. The kit includes high-quality braided nylon hose wrapped in a protective high-temperature sleeve to withstand the harsh environment of the engine bay. AN O-ring fittings provide a reliable, leak-proof seal that resists coolant loss and pressure fluctuations. The thermostat housings are engineered to match OE specifications, ensuring a perfect fit and easy installation without modifications. Additionally, new EGR crossover tube gaskets are included to maintain proper sealing and prevent leaks.
Installation & Fitment
The Fleece Performance Coolant Bypass Kit is a direct-fit upgrade for the following vehicles:
- 2007 Dodge Ram 2500 and 3500 with 5.9L Diesel
- 2008–2010 Dodge Ram 2500 with 6.7L Diesel
- 2008–2009 Dodge Ram 3500 with 6.7L Diesel
- 2011–2012 Ram 2500 and 3500 with 6.7L Diesel
Installation is straightforward for anyone with basic mechanical skills and common hand tools. The kit replaces factory components and requires no permanent modifications. All necessary mounting hardware and fittings are included to ensure a smooth, leak-free installation process.
What's Included
- Rear coolant bypass thermostat housing
- Front coolant bypass thermostat housing
- New EGR crossover tube gaskets
- Braided nylon coolant bypass hose with high-temperature protective sleeve
- AN O-ring fittings for secure connections
- Exhaust back pressure sensor mounting block
- Back pressure sensor line
- Mounting hardware
Ideal For
This coolant bypass kit is ideal for Dodge Ram owners who want to improve the cooling efficiency and reliability of their 5.9L or 6.7L Cummins diesel engines. It is especially recommended for trucks used in heavy towing, hauling, or off-road applications where engine temperatures can rise significantly. By preventing coolant temperature imbalances and pressure-related failures, this kit helps protect your investment and keeps your Cummins running strong for the long haul.
Fleece Performance Engineering is a diesel performance manufacturer known for innovative upgrades and reliability-focused solutions for Cummins, Duramax, and Power Stroke platforms. From turbo and fuel system components to cooling and electrical repair solutions, Fleece parts are built for owners who demand stronger performance without compromising dependability.
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YEARMAKEMODELSUBMODEL2007DodgeRam 25005.9L Diesel2008 - 2010DodgeRam 25006.7L Diesel2007DodgeRam 35005.9L Diesel2008 - 2009DodgeRam 35006.7L Diesel2011 - 2012Ram25006.7L Diesel2011 - 2012Ram35006.7L Diesel
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Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.
Standard shipping
Free Standard Shipping on orders over $300. Select “Free Shipping” at checkout. *Exclusions apply on oversized and freight items.
Free Easy Returns
Need to return an item? We make it easy. Email us and we'll send you a free return label with instructions on how to return.