Fleece Performance Coolant Bypass Kit
2013–2018 Ram 2500 / 3500 6.7L Diesel
Part #: FPE-CLNTBYPS-CUMMINS-1318
Overview
The Fleece Performance Coolant Bypass Kit is engineered specifically for the 2013–2018 Ram 2500 and 3500 models equipped with the 6.7L Cummins diesel engine. Designed to address a common cooling system weakness in these trucks, this kit improves coolant flow to the rear cylinders, 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, reducing the risk of freeze plug failures and enhancing engine reliability.
This coolant bypass kit is an essential upgrade for Cummins owners seeking to maintain optimal engine temperatures, prevent costly repairs, and extend the longevity of their diesel powertrain under demanding conditions.
Key Features
The Fleece Performance Coolant Bypass Kit offers a comprehensive solution to the cooling challenges faced by the 6.7L Cummins engine. Key features include:
- Secondary thermostat that activates based on coolant temperature, not pressure, for proactive cooling management
- Improved coolant flow to rear cylinders, lowering their operating temperature
- Prevents excessive pressure buildup in the cooling system, protecting freeze plugs from failure
- Ensures consistent coolant temperatures across all six cylinders for balanced engine cooling
- Complete kit includes braided nylon hose with high-temperature protective sleeve and AN O-ring fittings for a leak-free installation
- OEM-quality fit and finish for seamless integration with factory components
- Includes all necessary mounting hardware and gaskets for a straightforward installation
Construction & Design
The kit features precision-engineered thermostat housings designed to replace the factory components with improved functionality. The braided nylon coolant hose is reinforced with a high-temperature protective sleeve to withstand the harsh environment under the hood and prevent premature wear. AN O-ring fittings ensure a secure, leak-free connection, while the included gaskets provide a reliable seal for the EGR crossover tube. Every component is built to meet or exceed OEM standards, ensuring durability and long-term performance.
Installation & Fitment
The Fleece Performance Coolant Bypass Kit is designed for direct fitment on 2013–2018 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. Installation requires moderate mechanical skill and basic hand tools. The kit replaces the factory thermostat housings and installs a secondary thermostat along with the braided bypass hose. All necessary hardware and gaskets are included to facilitate a clean, leak-free installation without the need for modifications.
What's Included
- Rear coolant bypass thermostat housing
- Front coolant bypass thermostat housing
- New EGR crossover tube gaskets
- Black braided nylon coolant bypass hose with high-temperature protective sleeve
- AN O-ring fittings for secure connections
- Mounting hardware
Ideal For
This coolant bypass kit is ideal for Ram 2500 and 3500 owners who want to improve the cooling efficiency and reliability of their 6.7L Cummins diesel engine. It is especially beneficial for those who tow heavy loads, operate in hot climates, or use their trucks for demanding work applications where engine temperatures can rise significantly. By preventing coolant flow issues and pressure-related failures, this kit helps safeguard your investment and maintain peak engine performance.
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 Performance Coolant Bypass Kit: Ram 2500 / 3500 2013-2018 6.7L Diesel
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FPE-CLNTBYPS-CUMMINS-1318 Fleece Performance 13-18 Ram 2500 / 3500 Coolant Bypass Kit. This coolant bypass kit improves the cooling efficiency of the 6.7L Cummins by lowering temperatures at the rear cylinders and ensuring consistent coolant flow across all six cylinders. Featuring a secondary thermostat that operates based on temperature, it prevents pressure buildup that can cause freeze plug failures. The complete kit includes braided hose, AN O-ring fittings, and mounting hardware for a leak-free, OE-quality installation, enhancing engine reliability and longevity.
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Fleece Performance Coolant Bypass Kit
2013–2018 Ram 2500 / 3500 6.7L Diesel
Part #: FPE-CLNTBYPS-CUMMINS-1318
Overview
The Fleece Performance Coolant Bypass Kit is engineered specifically for the 2013–2018 Ram 2500 and 3500 models equipped with the 6.7L Cummins diesel engine. Designed to address a common cooling system weakness in these trucks, this kit improves coolant flow to the rear cylinders, 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, reducing the risk of freeze plug failures and enhancing engine reliability.
This coolant bypass kit is an essential upgrade for Cummins owners seeking to maintain optimal engine temperatures, prevent costly repairs, and extend the longevity of their diesel powertrain under demanding conditions.
Key Features
The Fleece Performance Coolant Bypass Kit offers a comprehensive solution to the cooling challenges faced by the 6.7L Cummins engine. Key features include:
- Secondary thermostat that activates based on coolant temperature, not pressure, for proactive cooling management
- Improved coolant flow to rear cylinders, lowering their operating temperature
- Prevents excessive pressure buildup in the cooling system, protecting freeze plugs from failure
- Ensures consistent coolant temperatures across all six cylinders for balanced engine cooling
- Complete kit includes braided nylon hose with high-temperature protective sleeve and AN O-ring fittings for a leak-free installation
- OEM-quality fit and finish for seamless integration with factory components
- Includes all necessary mounting hardware and gaskets for a straightforward installation
Construction & Design
The kit features precision-engineered thermostat housings designed to replace the factory components with improved functionality. The braided nylon coolant hose is reinforced with a high-temperature protective sleeve to withstand the harsh environment under the hood and prevent premature wear. AN O-ring fittings ensure a secure, leak-free connection, while the included gaskets provide a reliable seal for the EGR crossover tube. Every component is built to meet or exceed OEM standards, ensuring durability and long-term performance.
Installation & Fitment
The Fleece Performance Coolant Bypass Kit is designed for direct fitment on 2013–2018 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. Installation requires moderate mechanical skill and basic hand tools. The kit replaces the factory thermostat housings and installs a secondary thermostat along with the braided bypass hose. All necessary hardware and gaskets are included to facilitate a clean, leak-free installation without the need for modifications.
What's Included
- Rear coolant bypass thermostat housing
- Front coolant bypass thermostat housing
- New EGR crossover tube gaskets
- Black braided nylon coolant bypass hose with high-temperature protective sleeve
- AN O-ring fittings for secure connections
- Mounting hardware
Ideal For
This coolant bypass kit is ideal for Ram 2500 and 3500 owners who want to improve the cooling efficiency and reliability of their 6.7L Cummins diesel engine. It is especially beneficial for those who tow heavy loads, operate in hot climates, or use their trucks for demanding work applications where engine temperatures can rise significantly. By preventing coolant flow issues and pressure-related failures, this kit helps safeguard your investment and maintain peak engine performance.
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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YEARMAKEMODELSUBMODEL2013 - 2018Ram25006.7L Diesel2013 - 2018Ram35006.7L Diesel
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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.