Fits 1989-2023 Dodge/Ram 2500 and 3500 (5.9L / 6.7L / 12V).

During a head gasket replacement or engine build, ensuring precise alignment between the cylinder head and engine block is critical for a proper seal. Fleece Performance replacement cylinder head dowels provide a direct-fit solution to ensure your head sits correctly on the deck. These dowels are essential for maintaining the structural integrity of the mating surface and preventing gasket shift during installation.

This kit replaces worn or lost factory hardware and is designed to meet or exceed original equipment specifications. It is a necessary addition for any 5.9L or 6.7L Cummins refresh or performance build.

• Precision-machined for exact tolerances and alignment
• Direct replacement for Cummins part number: 3902343
• Application-specific for 12-valve and 24-valve Cummins engines
• Manufacturer Part Number: FPE-CUMM-CYLHD-KIT
• Includes two (2) cylinder head dowels

Fits 2007-2018 Dodge and Ram 2500/3500 heavy-duty trucks equipped with the 6.7L Cummins diesel engine.

The Fleece Performance CP3K is a precision-modified high-pressure fuel pump engineered to eliminate the factory fuel flow restriction that typically occurs at 3,000 RPM. On stock CP3 pumps, this drop in fuel flow leads to a corresponding loss in rail pressure and horsepower exactly when the engine is under peak demand. The CP3K provides a cost-effective solution to maintain desired rail pressure across your entire RPM range without the complexity or cost of a full racing pump.

This pump is an ideal choice for high-performance street applications and serves as a perfect primary pump in dual-pump configurations where the extreme volume of a PowerFlo 750 isn't required, but high-RPM stability is essential.

• Manufacturer Part Number: FPE-CUMM-CP3K-6.7
• Eliminates high-RPM fuel flow restrictions found in factory pumps
• Maintains consistent rail pressure beyond 3,000 RPM
• Modified factory CP3 architecture for drop-in reliability
• Excellent for single-pump upgrades or dual-pump setups

Fits select 2003-2007 Dodge Ram 2500 and 3500 models (5.9L).

The Fleece Performance CP3K is a modified high-pressure fuel pump specifically engineered to eliminate the factory fuel flow restriction that typically occurs at 3,000 RPM. On a stock CP3 pump, the drop in fuel flow and rail pressure at higher engine speeds results in significant horsepower loss. This cost-effective upgrade allows your Cummins engine to maintain consistent fuel rail pressure through the entire RPM range, ensuring your performance is never bottlenecked by the pump.

• Eliminates factory fuel flow restriction above 3,000 RPM
• Maintains desired rail pressure for consistent power delivery
• Ideal for street and towing applications requiring reliable fueling
• Manufacturer Part Number: FPE-CUMM-CP3K-5.9

Note: This 5.9L pump is not designed for use in belt-drive applications, such as dual pump setups.

Fits select 2003-2007 Dodge Ram 2500 and 3500 models (5.9L / 6.7L).

The Fleece Performance CP3 Fuel Line Adaptation Kit is designed for enthusiasts installing a newer 2007.5-2018 6.7L Bosch CP3 pump onto a 2003-2007 5.9L Cummins engine. This kit provides the necessary plumbing to bridge the gap between the 5.9L fuel system and the 6.7L pump architecture, ensuring reliable high-pressure fuel delivery and proper fitment without custom fabrication.

• Engineered specifically for 2003-2007 5.9L Cummins engines utilizing a 6.7L style CP3.
• High-flow feed and return fittings optimize fuel volume and efficiency.
• High-pressure fuel line features precise routing to match factory-style installation.
• Includes all necessary hose clamps and lines for a complete conversion.
• Manufacturer Part Number: FPE-CUMM-CP3-FL-ADPT-KIT

Kit Includes:

• New high-pressure fuel line
• High-flow CP3 feed fitting
• High-flow CP3 return fitting
• CP3 feed line
• Hose clamps

Fits select 2003-2018 Dodge and Ram 2500/3500 trucks equipped with the Cummins diesel engine.

Clean up the appearance of your engine bay with the Fleece Performance CP3 Nut Cover. This precision-machined component is designed to install directly over the factory CP3 high-pressure fuel pump mounting nut, providing a finished, professional look to your Cummins fueling system. It is an ideal solution for enthusiasts looking to detail their engine bay or complete the look after a CP3 pump replacement or upgrade.

• Designed specifically for the Cummins CP3 high-pressure fuel pump nut
• Enhances engine bay aesthetics with a clean, finished appearance
• Direct fit for 5.9L and 6.7L Cummins applications
• Precision-machined for a secure fit
• Manufacturer Part Number: FPE-CUMM-CP3-CVR

Fits select 2007-2018 Dodge and Ram 2500/3500 trucks (6.7L).

The Fleece Performance PowerFlo 750 is a precision-engineered CP3 pump upgrade designed to support up to 750 RWHP when paired with appropriate modifications. This 10mm displacement pump solves the common factory fuel flow restriction that typically begins at 3,000 RPM. While stock CP3 pumps often lose rail pressure at higher engine speeds, the PowerFlo 750 maintains consistent pressure through the entire RPM range, ensuring your 6.7L Cummins has the fuel delivery required for high-performance applications.

Every PowerFlo 750 undergoes rigorous validation on an in-house engine simulator and pump test stand to simulate real-world conditions. This ensures that every unit (MPN: FPE-CUMM-CP3-10MM-6.7) is ready for immediate installation and reliable service.

• Manufacturer Part Number: FPE-CUMM-CP3-10MM-6.7
• Power Support: Proven for up to 750 RWHP
• Pump Displacement: 10mm
• Performance: Maintains rail pressure and flow above 3,000 RPM
• Validation: Tested on engine simulator and pump test stand

Fits 2003-2007 Dodge Ram 2500 and 3500 (5.9L Cummins).

The Fleece Performance PowerFlo 750 is a precision-engineered CP3 injection pump upgrade designed to eliminate the factory fuel flow restrictions that typically begin at 3,000 RPM. On a stock configuration, fuel flow and rail pressure often drop off at higher engine speeds, resulting in lost horsepower. This PowerFlo 750 upgrade allows you to maintain consistent fuel rail pressure across your entire RPM range, providing enough volume to support up to 750 RWHP with the necessary supporting modifications.

Each pump is rigorously validated on an in-house engine simulator and pump test stand to ensure it meets strict performance standards under real-world operating conditions. This is a durable, cost-effective solution for owners looking to maximize the output of their 5.9L Cummins without the high cost of a dual-pump setup.

• Manufacturer Part Number: FPE-CUMM-CP3-10MM-5.9
• Performance Rating: Supports up to 750 RWHP
• Corrects fuel flow drop-off occurring above 3,000 RPM
• Maintains consistent fuel rail pressure through the full RPM range
• In-house tested on engine simulators and pump stands for reliability

Fits select 2013-2018 Ram 2500 and 3500 (6.7L).

Replace your brittle factory plastic coolant reservoir with this durable, fabricated aluminum tank from Fleece Performance. Finished in a high-gloss black powder coat, this reservoir is a direct bolt-on upgrade that addresses common leaking issues while cleaning up the engine bay. The slim-profile design also provides additional clearance around the turbocharger, making it an ideal choice for both stock and modified trucks.

• Fabricated aluminum construction with gloss black powder coat finish
• Includes low coolant float switch (MPN: FPE-FS-UNIV-2M-SS)
• Mounts to factory location behind the passenger-side battery
• Utilizes the original factory coolant tank cap
• Direct replacement for MOPAR 68166475AD
• Includes mounting hardware, hose, and hose clamps for a complete installation
• MPN: FPE-CUMM-CLNT-TNK-1318

Fits 2019-2024 Ram 2500 and 3500 trucks equipped with the Cummins diesel engine.

Whether you are upgrading your turbocharger or performing routine maintenance, the factory plastic CCV tube coupler is a notorious failure point. Prone to cracking and breakage under heat and stress, the OE plastic unit can lead to vacuum leaks and engine bay messes. This Fleece Performance upgrade provides a permanent solution by replacing the fragile plastic component with a precision-engineered billet aluminum alternative.

CNC-machined for a perfect fit, this coupler features a durable anodized finish to resist corrosion and maintain its integrity through countless heat cycles. It is designed to bolt directly in place of the factory hardware without modification.

• CNC-machined billet aluminum construction
• Durable black anodized finish
• Eliminates cracking and breakage common with OE plastic
• Direct replacement for Mopar Part Number: 68473119AA
• Manufacturer Part Number: FPE-CUMM-CCV-19

Fits 2007-2018 Dodge Ram 2500 and 3500 (6.7L Cummins).

Replace a cracked, leaking, or clogged factory turbo oil drain tube with this Fleece Performance silicone hose drain kit. Engineered as a direct-fit solution for all factory VGT turbochargers and aftermarket drop-in replacements, this kit addresses common failure points in the OE oiling system. The assembly features a larger internal diameter (ID) formed silicone hose to promote maximum oil flow and prevent carbon buildup.

Installation is straightforward using the included black anodized billet aluminum fittings. These fittings feature integral O-rings to ensure a leak-free seal against the engine block and turbocharger housing without the need for messy gaskets. This kit is a durable upgrade for any 6.7L Cummins owner looking to improve reliability and oil drainage efficiency.

• Direct replacement for Chrysler OE part number: 68005450AA
• High-temperature formed silicone hose for superior longevity and durability
• Precision-machined black anodized billet aluminum fittings
• Integral O-rings for a reliable, leak-free seal
• Includes all necessary new fasteners for installation
• Manufacturer Part Number: FPE-CTDT-VGT-KIT

Fits select 2003-2022 Dodge/Ram 2500 and 3500 trucks. This service kit is designed specifically for maintaining and resealing Fleece Performance turbo oil drain tube kits, ensuring a leak-free connection between the turbocharger and the engine block.

This kit includes replacement seals for both the block-side adapter and the turbo-side adapter. Whether you are performing routine maintenance or reinstalling a turbocharger, these high-quality O-rings provide a reliable seal to protect your engine's oiling system.

• Specifically designed for Fleece Performance Turbo Oil Drain Tube Kits
• Includes two (2) O-rings for the engine block drain adapter
• Includes two (2) square-cut O-ring options for the turbo drain adapter
• Compatible with Fleece kits: FPE-CTDT-19-KIT, FPE-CTDT-VGT-KIT, FPE-CTDT-CW-KIT, and FPE-CTDT-KIT
• Manufacturer Part Number: FPE-CTDT-SERVICE-KIT

Fits select 2003-2018 Dodge/Ram 2500 and 3500 trucks. This Fleece Performance Universal Cummins Turbo Drain Tube Kit provides the necessary components to connect your turbocharger to the factory block drain location when performing a 2nd Gen Swap.

Built for durability and heat resistance, the 20-inch drain tube features a corrugated Teflon core for maximum flow and flexibility, wrapped in a braided stainless steel exterior. The included 6061 aluminum fittings are finished in black anodize for corrosion resistance and include all required O-rings and gaskets for a leak-free installation.

• Braided stainless steel exterior with corrugated Teflon internal tubing
• 6061 anodized aluminum fittings
• Drain tube length: 20 inches (end-to-end)
• Includes 7/8-14 to -10AN fittings and necessary flange hardware
• Manufacturer Part Number: FPE-CTDT-KIT

Kit Includes: Drain Tube, Cummins Turbo Drain Tube Adapter, Turbo Drain Flange Adapter, Turbo Drain Gasket, (2) 7/8-14 to -10AN Fittings, (2) 3/8"-16 Flange Head Bolts, (2) M10 x 1.5 Flange Head Bolts, and Installation Instructions.

Fits 1994-2002 Dodge Ram 2500 and 3500 (5.9L).

Eliminate the installation difficulties associated with rigid, non-flexible OE drain lines with the Fleece Performance Turbocharger Drain Tube Kit. This kit is engineered specifically for the 12V and 24V 5.9L Cummins engine equipped with factory HX35 or HY35 turbochargers, as well as aftermarket drop-in replacements like the Cheetah Series. By replacing the stiff factory line with a high-temperature, formed silicone hose, you ensure a simpler installation and more reliable oil drainage.

The kit features a premium black anodized billet aluminum flange with an integral O-ring for a secure, leak-free seal against the turbocharger housing. The larger internal diameter of the smooth-bore silicone hose optimizes oil flow back to the crankcase, preventing backup and seal failure. This kit is a direct technical replacement for Cummins part numbers 3918585 and 3946300.

• Formed silicone hose provides superior longevity and flexibility over factory hard lines
• Anodized billet aluminum flange with integral O-ring for a precision fit
• Larger ID hose design ensures proper oil drainage from the turbocharger
• Includes all necessary fasteners for a complete install
• Fits HX35 and HY35 turbochargers in the factory mounting location
• Manufacturer Part Number: FPE-CTDT-HX35-KIT

Fits 2003-2007 Dodge Ram 2500 and 3500 models (5.9L Cummins).

Eliminate the installation difficulties associated with rigid, non-flexible OE drain lines. This Fleece Performance turbo drain tube kit is designed specifically for 5.9L Cummins engines using factory-style turbochargers or aftermarket drop-in replacements, such as the Cheetah Series. The patent-pending design features a larger internal diameter (ID) smooth-bore silicone hose to maximize oil flow and ensure proper drainage from the turbocharger center section to the oil pan.

Constructed for long-term durability, the kit utilizes high-temperature formed silicone and black anodized billet aluminum fittings. Integral O-rings provide a reliable, leak-free seal without the need for messy gaskets. This kit is a direct replacement for Chrysler part number 3970875 and includes all necessary fasteners for a straightforward installation.

• Flexible formed silicone hose for simplified installation and vibration resistance
• Black anodized billet aluminum flange with integral O-ring for a leak-free seal
• Larger internal diameter compared to stock for optimized oil drainage
• Compatible with OE-style and Fleece Cheetah series turbochargers
• Includes new mounting fasteners
• Manufacturer Part Number: FPE-CTDT-CW-KIT
• Direct replacement for Chrysler OE: 3970875

Fits 2019-2022 Ram 2500 and 3500 models equipped with the 6.7L Cummins engine.

Simplify your turbocharger installation with the Fleece Performance Turbo Drain Tube Kit. Designed to eliminate the struggle of working with rigid, non-flexible OE drain lines, this patent-pending kit utilizes a high-flow, flexible silicone hose. This kit is a direct fit for 2019+ 6.7L Cummins factory VGT turbochargers and aftermarket drop-in replacements like the Fleece Cheetah Series. The larger internal diameter and smooth bore ensure optimal oil drainage to prevent backup and seal failure.

• Construction: Formed silicone hose for maximum longevity and heat resistance.
• Fittings: Black anodized billet aluminum fittings with integral O-rings for a leak-free seal.
• Direct Replacement: Replaces Chrysler part number 68445161AA.
• Installation: Includes new fasteners and all necessary hardware for a complete bolt-on solution.
• Manufacturer Part Number: FPE-CTDT-19-KIT

Fits select 1998-2021 Dodge and Ram 2500 and 3500 trucks.

The Fleece Performance Cummins turbo drain tube adapter provides a robust solution for custom turbocharger plumbing. Engineered to press-fit into the engine block's factory drain location, this adapter allows for the routing of a 7/8" ID hose, making it essential for custom turbo configurations. Each unit is CNC-machined from 6061 aluminum for precise tolerances and finished with black anodizing for superior corrosion resistance and a clean aesthetic.

• Precision machined from high-grade 6061 aluminum
• Durable black anodized finish
• Compatible with 7/8" ID hose turbo drain lines
• Includes two high-quality O-rings for a leak-free seal
• Direct fit for the factory engine block drain tube location
• Manufacturer Part Number: FPE-CTDA-78HS

Fits 1998-2021 Dodge and Ram 2500/3500 trucks with Cummins engines.

The Fleece Performance Universal Cummins Turbo Drain Tube Adapter simplifies custom turbo installations by converting the factory engine block drain port to a standard -10 AN male fitting. This allows for the use of flexible high-performance braided hoses rather than struggling with rigid factory drain tubes that may not align with aftermarket turbocharger setups. Precision-engineered for a leak-free seal, this adapter presses directly into the block using the included O-rings, maintaining a factory-style fit while providing professional-grade plumbing versatility.

• CNC-machined from 6061 billet aluminum for superior strength
• Corrosion-resistant black anodized finish for long-lasting appearance
• Converts factory block drain port to a -10 AN male flare
• Direct replacement for the factory press-in drain tube
• Includes two replacement O-rings for a secure, leak-free installation
• Manufacturer Part Number: FPE-CTDA-10AN

Fits select 2003-2018 Dodge Ram and Ram 2500/3500 trucks (Cummins). This Fleece Performance Turbo Oil Feed Line Kit is specifically engineered for owners running S300 or S400 turbochargers in a 2nd Gen lower mount position. By utilizing a high-clearance 90-degree fitting, this kit ensures a secure oil supply for 1/4" NPT inlet turbochargers while accommodating the specific spatial requirements of a lower-mounted setup.

Built for durability in high-heat environments, the kit features a -6 smooth bore Teflon (PTFE) hose protected by a high-temperature sleeve to prevent fluid degradation and hose failure. Please note: This kit is designed strictly for lower mount configurations and is not compatible with high mount turbocharger setups.

• Manufacturer Part Number: FPE-CRTFL-S3S4
• Hose Construction: Extra flexible -6 smooth bore Teflon
• Thermal Protection: Integrated high-temperature protective sleeve
• Engine Side Fitting: -6AN to M12 aluminum fitting with sealing washer
• Turbo Side Fitting: 90-degree 1/4" NPT fitting
• Compatibility: S300 and S400 turbochargers with 1/4" NPT inlets

Fits 1994-2018 Dodge Ram 2500 and 3500 (5.9L / 6.7L Cummins) with factory Holset or Fleece Cheetah turbochargers in the stock location.

Ensure consistent oil delivery to your turbocharger with the Fleece Performance replacement turbocharger oil feed line kit. This kit is designed to replace the often restrictive or leaking factory line with a high-performance solution that withstands the extreme heat of the engine bay. Featuring an extra-flexible -6 smooth bore Teflon hose protected by a high-temperature sleeve, this kit offers superior durability compared to OE hard lines or standard rubber hoses.

• Direct replacement for OE Part Number: 68002982AA
• Includes -6 smooth bore Teflon hose with a protective high-temperature sleeve
• Includes (2) -6AN to M12 aluminum fittings with sealing washers
• Compatible with stock Holset or Fleece Cheetah turbos in the factory mounting location
• Manufacturer Part Number: FPE-CRTFL-OE

Fits 2019-2022 Ram 2500 and 3500 models equipped with the 6.7L Cummins engine.

Ensure your turbocharger receives a reliable oil supply with the Fleece Performance replacement oil feed line kit. This kit is specifically designed for trucks running a Cheetah or stock Holset VGT turbocharger in the factory location. Constructed from extra-flexible, smooth-bore Teflon hose, this line is built to withstand high temperatures and pressures. The integrated thermal heat shield provides an additional layer of protection against the intense heat generated in the engine bay, preventing line degradation and ensuring consistent oil flow.

• Replacement for Chrysler OE part number: 68444984AA
• -6 AN oil feed line with smooth-bore Teflon construction
• High-temperature thermal heat shield included
• (2) -6AN to M12 aluminum fittings with sealing washers
• Direct-fit for factory turbocharger locations
• Manufacturer Part Number: FPE-CRTFL-19

Eliminate fuel flow restrictions to your high-pressure fuel pump with the Fleece Performance Universal 1/2in CP3 Feed Fitting. Designed for high-performance diesel applications, this fitting allows for significantly increased fuel feed capacity compared to standard restrictive inlets, ensuring your CP3 pump receives the volume necessary to maintain consistent rail pressure.

Constructed from high-grade 316 stainless steel, this fitting is engineered to withstand harsh environments and resist corrosion for long-term reliability. The 1/2-inch barbed inlet provides a secure connection point for larger diameter fuel lines, making it an essential component for trucks equipped with high-flow lift pumps and modified fuel systems.

• Precision machined from 316 Stainless Steel for maximum durability
• Designed to increase fuel feed volume to the CP3 pump
• 1/2" barbed inlet for high-flow fuel line compatibility
• Includes a new sealing washer for a leak-free installation
• Manufacturer Part Number: FPE-CP3-FEED

Fits select 2006-2007 Dodge Ram 2500 and 3500 trucks (Cummins diesel).

This Fleece Performance replacement coolant bypass hose is engineered to restore the performance of your existing bypass system. Manufactured from high-quality EPDM (Ethylene Propylene Diene Monomer) rubber, this hose is designed to withstand the high under-hood temperatures and cooling system pressures common in Cummins applications, offering excellent resistance to heat, ozone, and weather aging.

This component is specifically designed as a service part for Fleece Performance coolant bypass kits, ensuring a leak-free fit and maintaining the proper flow characteristics required to protect your rear cylinders from heat soak.

• Manufacturer Part Number: FPE-CLNTBYPS-HS-HC-0607
• Material: Heavy-duty EPDM rubber
• Compatible Kits: FPE-CLNTBYPS-CUMMINS-0607 and FPE-CLNTBYPS-CUMMINS-0607-SS

Fits 1998-2002 Dodge Ram 2500 and 3500 (5.9L / 6.7L).

The rear cylinders on 5.9L and 6.7L Cummins engines often suffer from restricted coolant flow, leading to significantly higher temperatures at the back of the block. This thermal imbalance creates excessive pressure that can blow out external freeze plugs or the smaller diameter plugs located under the valve cover. The Fleece Performance VP Coolant Bypass Kit addresses this cooling deficiency at the source.

Unlike other systems that react only to excessive pressure, this kit features a secondary thermostat that operates based on coolant temperature. By opening at a set temperature, it ensures consistent flow and thermal stability across all six cylinders before pressure reaches dangerous levels. The kit includes high-quality stainless steel braided lines and AN O-ring fittings to provide a secure, leak-free connection. Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-VP-SS.

• Prevents damaging coolant pressure buildup at the rear of the engine block
• Lowers coolant temperatures at the rear cylinders for improved engine longevity
• Ensures consistent operating temperatures across the entire cylinder head
• Temperature-controlled secondary thermostat for proactive cooling management
• Complete kit includes stainless steel braided hose and AN O-ring fittings

Fits 1998-2002 Dodge Ram 2500 and 3500 (5.9L / 6.7L).

The rear cylinders on the 5.9L and 6.7L Cummins engines often suffer from restricted coolant flow, leading to localized hot spots and excessive pressure buildup at the back of the block. This thermal stress can result in catastrophic failure, including blown external freeze plugs or the smaller diameter plugs located under the valve cover. The Fleece Performance VP Coolant Bypass Kit addresses this design flaw by integrating a secondary thermostat that operates based on coolant temperature rather than just pressure. This ensures consistent cooling across all six cylinders and relieves the pressure before it reaches critical levels.

• Regulates coolant temperature at the rear cylinders to improve engine longevity
• Secondary thermostat design ensures cooling based on temperature for consistent performance
• Prevents damaging pressure buildup that leads to freeze plug failure
• High-quality braided hose with AN O-ring fittings for a secure, leak-free seal
• Complete installation kit specifically designed for VP-series Cummins applications
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-VP

Fits select 1994-2018 Dodge and Ram 2500/3500 trucks.

Maintain the efficiency of your cooling system with the Fleece Performance Coolant Bypass Service Kit. This complete maintenance package includes the essential seals and hardware required to refresh your Fleece Coolant Bypass system, ensuring long-term reliability and preventing leaks at critical connection points. The kit is designed to be universal for all Fleece bypass production years by including two different thermostats; you will select and install the one that matches your specific bypass housing.

Note: This kit is designed specifically for servicing the Fleece Performance bypass assembly and does not include the primary Cummins engine thermostat. Depending on your specific kit version (such as 1994-2002 models), some included O-rings may not be required for your application.

• Complete set of replacement fasteners
• 2 thermostats (use one depending on production year)
• 3 new square-cut O-rings
• 1 new standard O-ring
• 2 new O-rings for each AN fitting
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-SER-KIT

Fits 2003-2007 Dodge Ram 2500 and 3500 models equipped with manual transmissions (6.7L).

The rear cylinders on the 5.9L and 6.7L Cummins engines often suffer from restricted coolant flow, leading to the highest operating temperatures at the back of the block. This thermal imbalance can cause excessive pressure to build, potentially blowing out external freeze plugs or the smaller diameter plugs located under the valve cover. The Fleece Performance coolant bypass kit addresses this vulnerability by adding a secondary thermostat. Unlike other kits that rely on pressure alone, this system is temperature-actuated, opening to ensure consistent coolant flow across all six cylinders before pressure becomes a problem.

This kit improves the long-term reliability and cooling efficiency of the Cummins platform, protecting the engine from catastrophic failure during high-load or over-temperature conditions. Each kit includes a high-quality stainless steel braided hose and AN O-ring fittings to ensure a secure, leak-free installation.

• Lowers coolant temperatures at the rear cylinders
• Ensures consistent thermal profiles across the entire engine block
• Prevents damaging pressure buildup and freeze plug failure
• Includes stainless steel braided line and AN O-ring fittings
• Temperature-based thermostat operation for proactive cooling
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-MAN-SS

Fits 2003-2007 Dodge Ram 2500 and 3500 models equipped with a manual transmission (5.9L / 6.7L Cummins).

The rear cylinders on the 5.9L and 6.7L Cummins engines frequently suffer from inadequate coolant flow, leading to significantly higher temperatures at the back of the block. This thermal imbalance creates excessive pressure that can blow out freeze plugs externally or smaller plugs located under the valve cover, often resulting in catastrophic engine failure. The Fleece Performance Coolant Bypass Kit is a critical reliability upgrade designed to normalize temperatures across all six cylinders.

Unlike other bypass kits that operate solely on pressure, this system utilizes a secondary thermostat that opens based on coolant temperature. This proactive approach ensures consistent flow and prevents pressure spikes before they can damage your engine components. The kit is built for long-term durability with high-quality materials to ensure a leak-free installation.

• Lowers coolant temperatures at the vulnerable rear cylinders
• Ensures consistent thermal management across the entire engine block
• Prevents damaging coolant pressure buildup and freeze plug failure
• Includes high-quality braided hose and AN O-ring fittings for a secure seal
• Secondary thermostat-controlled operation for precise cooling
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-MAN

Fits select 2019-2022 Ram 2500 and 3500 trucks equipped with the 6.7L Cummins engine.

The 6.7L Cummins engine often suffers from inadequate coolant flow to the rear cylinders, leading to localized hot spots and excessive pressure build-up. This thermal imbalance can cause external freeze plugs to blow or, more critically, dislodge the smaller diameter plugs located under the valve cover. The Fleece Performance Coolant Bypass Kit addresses this vulnerability with a patent-pending design that integrates a secondary thermostat. Unlike other kits that rely on pressure relief, this system operates based on temperature, ensuring consistent coolant flow across all six cylinders before pressure becomes a factor.

Built for long-term reliability and an OE-style fit, this kit includes high-quality braided hoses and AN O-ring fittings to provide a secure, leak-free seal. By stabilizing temperatures at the rear of the block, you protect your engine from catastrophic failure and improve the overall longevity of the cooling system.

• Improved Cooling: Lowers coolant temperatures at the rear cylinders by increasing flow.
• Temperature-Based Control: Secondary thermostat activates based on heat rather than waiting for pressure spikes.
• Consistent Thermal Gradient: Ensures even temperatures across the entire cylinder head.
• Durable Construction: Includes braided hose and AN O-ring fittings for maximum leak protection.
• MPN: FPE-CLNTBYPS-CUMMINS-19

Fits 2013-2018 Ram 2500 and 3500 (6.7L).

The 6.7L Cummins engine often suffers from restricted coolant flow to the rear cylinders, leading to localized overheating and excessive pressure buildup. This thermal stress can cause external freeze plugs to fail or blow out the smaller diameter plugs located under the valve cover. The Fleece Performance Coolant Bypass Kit addresses this design flaw by adding a secondary thermostat at the rear of the block.

Unlike pressure-relief style kits that only react once a problem exists, this temperature-based bypass ensures consistent coolant flow across all six cylinders. By opening based on temperature, it proactively regulates heat at the rear of the engine, protecting your cooling system and improving long-term reliability. The kit features an OE-style fit and finish with high-quality components designed for a leak-free installation.

• Thermostat Regulation: Uses a temperature-sensitive secondary thermostat for proactive cooling management.
• Leak-Free Seal: Includes AN O-ring fittings and a black braided nylon coolant hose.
• Thermal Protection: Prevents damaging pressure buildup and freeze plug blowouts.
• Complete Kit: Includes front and rear thermostat housings, EGR crossover tube gaskets, high-temperature protective hose sleeve, and all necessary mounting hardware.
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-1318

Fits 1994-1998 Dodge Ram 2500 and 3500 (5.9L / 6.7L).

The rear cylinders on the Cummins block often suffer from restricted coolant flow, leading to localized hotspots and excessive pressure build-up. This thermal imbalance can result in catastrophic failure, including blown external freeze plugs or the smaller plugs located under the valve cover. The Fleece Performance 12V Coolant Bypass Kit addresses this design flaw at the source to improve the reliability and longevity of your engine.

Unlike pressure-based systems from other brands, this kit utilizes a secondary thermostat that reacts to actual coolant temperature. This ensures consistent cooling across all six cylinders by allowing flow before pressure reaches critical levels. The kit features high-quality stainless steel braided lines and AN O-ring fittings to provide a secure, leak-free connection that replaces the factory shortcomings.

• Lowers coolant temperatures at the rear cylinders
• Ensures consistent thermal management across all cylinders
• Prevents damaging pressure build-up and freeze plug failure
• Temperature-based secondary thermostat for proactive cooling
• Complete kit with heavy-duty stainless steel braided hose
• Leak-free AN O-ring fittings included
• Manufacturer Part Number: FPE-CLNTBYPS-CUMMINS-12V-SS