Glacier Diesel Power 2007.5–2009 Dodge Ram 6.7L Cummins MK-2+ Fuel Filter System & 3/8" Big Line Kit (MK27509-BLK)
Description
The high-pressure common-rail fuel system in your 2007.5–2009 Dodge Ram 6.7L Cummins depends on a steady supply of clean, unrestricted fuel. The Glacier Diesel Power MK-2+ Fuel Filter System improves both by combining high-efficiency secondary filtration with Glacier’s proven 3/8-inch Big Line Kit.
The MK-2+ adds a genuine Fleetguard FF5320 2-micron fuel filter between the factory fuel filter housing and the CP3 injection pump, providing an additional stage of filtration before fuel reaches expensive injection-system components. At the same time, the included Big Line Kit replaces the restrictive factory supply line between the filter housing and CP3 with larger, serviceable 3/8-inch fuel hose and high-quality fittings.
A custom Glacier mounting bracket positions the secondary filter just ahead of the intake manifold, keeping it protected under the hood while remaining accessible for routine service. Whether your truck is stock, used for towing, or modified for additional performance, the MK-2+ delivers improved filtration and fuel flow in one complete package.
Features
- Fits 2007.5–2009 Dodge Ram 6.7L Cummins
- Genuine Fleetguard FF5320 fuel filter
- High-efficiency 2-micron secondary filtration
- Adds an additional filter before the CP3 injection pump
- Glacier 3/8-inch Big Line Kit included
- Replaces the restrictive factory supply line
- High-quality fuel hose and fittings
- Laser-cut and CNC-formed Glacier mounting bracket
- Convenient under-hood filter location
- Easy-to-service spin-on filter design
- Supports stock and modified fuel systems
- Designed and manufactured by Glacier Diesel Power
Why Upgrade to the MK-2+?
The factory filtration system provides the truck’s primary fuel protection, but fine particulate contamination can still contribute to wear inside the CP3 and injectors over time.
The MK-2+ adds a dedicated secondary filter immediately before the high-pressure injection system while also removing one of the more restrictive sections of the factory supply plumbing.
This combination provides two important upgrades:
- Cleaner fuel: The FF5320 adds 2-micron secondary filtration before the CP3.
- Improved delivery: The 3/8-inch Big Line Kit reduces restriction between the factory filter housing and injection pump.
That makes the MK-2+ an excellent upgrade for daily drivers, tow rigs, work trucks, and performance builds.
Glacier Fuel System Tech Tip
A larger fuel line does not create fuel pressure on its own. Its job is to reduce unnecessary restriction so a healthy lift pump can deliver fuel more efficiently.
The Fleetguard FF5320 and 3/8-inch plumbing used in this system are designed to support approximately 100 GPH with less than 1 PSI of pressure differential, providing high-efficiency filtration without becoming an unnecessary restriction in properly configured systems.
Fuel delivery still depends on the condition of the lift pump, filters, tank pickup, electrical supply, and the rest of the fuel system. Monitoring supply pressure under load remains one of the best ways to evaluate overall system health.
Why Glacier Built It This Way
Glacier did not want customers to choose between improved filtration and improved fuel flow.
The MK-2+ combines both upgrades into one vehicle-specific system. The custom laser-cut and CNC-formed bracket positions the FF5320 securely near the intake manifold, while the Big Line Kit replaces the restrictive factory connection between the filter housing and CP3.
The result is a clean installation that provides:
- Additional CP3 and injector protection
- Reduced fuel-supply restriction
- Convenient filter servicing
- Quality vehicle-specific mounting
- Compatibility with stock and modified trucks
Applications
Fits:
- 2007.5 Dodge Ram 6.7L Cummins
- 2008 Dodge Ram 6.7L Cummins
- 2009 Dodge Ram 6.7L Cummins
Verify your truck’s fuel-system configuration before ordering.
Kit Contents
The Glacier Diesel Power MK-2+ Kit includes:
- Fleetguard FF5320 fuel filter
- Glacier vehicle-specific mounting bracket
- Glacier 3/8-inch Big Line Kit
- Fuel hose and fittings
- Mounting hardware
- Installation components
Important Notes
- Designed for 2007.5–2009 Dodge Ram trucks equipped with the 6.7L Cummins.
- Retains the factory primary fuel filter housing.
- Adds the FF5320 as a secondary filter before the CP3.
- Replaces the factory supply line between the filter housing and CP3.
- Prime the fuel system after installation.
- Inspect all connections for leaks before operating the engine.
- Recheck fittings and hose routing after the first complete heat cycle.
- Replace the FF5320 according to fuel quality, restriction, and recommended service intervals.
Common Failure Point
Fine contamination and restrictive supply plumbing can both affect long-term common-rail fuel-system reliability.
The factory filter remains the primary filtration stage, while the MK-2+ adds another layer of protection directly before the CP3. Replacing the restrictive supply line at the same time helps ensure the added filtration is not paired with one of the smallest sections of the original plumbing.
The MK-2+ will not correct a weak lift pump, plugged primary filter, contaminated fuel source, or unrelated fuel-system fault. Those components should still be inspected whenever low pressure or reduced performance is present.
Complete Your Fuel System
Complete your 6.7L Cummins fuel system with:
- Glacier Fuel Pressure Gauge and Sender
- Glacier Fuel Pressure Test Fittings
- Glacier Fuel Tank Vent Kit
- Replacement Fleetguard FF5320 Fuel Filters
- Glacier Fuel Boss Mechanical Lift Pump
- Glacier Twin Fuel Filter Systems
- Glacier Severe Service Fuel Filter Systems
- Glacier Fuel Return Line Upgrades
Glacier Diesel Power 2007.5–2009 Dodge Ram 6.7L Cummins MK-2+ Fuel Filter System & 3/8" Big Line Kit (MK27509-BLK)
Description
The high-pressure common-rail fuel system in your 2007.5–2009 Dodge Ram 6.7L Cummins depends on a steady supply of clean, unrestricted fuel. The Glacier Diesel Power MK-2+ Fuel Filter System improves both by combining high-efficiency secondary filtration with Glacier’s proven 3/8-inch Big Line Kit.
The MK-2+ adds a genuine Fleetguard FF5320 2-micron fuel filter between the factory fuel filter housing and the CP3 injection pump, providing an additional stage of filtration before fuel reaches expensive injection-system components. At the same time, the included Big Line Kit replaces the restrictive factory supply line between the filter housing and CP3 with larger, serviceable 3/8-inch fuel hose and high-quality fittings.
A custom Glacier mounting bracket positions the secondary filter just ahead of the intake manifold, keeping it protected under the hood while remaining accessible for routine service. Whether your truck is stock, used for towing, or modified for additional performance, the MK-2+ delivers improved filtration and fuel flow in one complete package.
Features
- Fits 2007.5–2009 Dodge Ram 6.7L Cummins
- Genuine Fleetguard FF5320 fuel filter
- High-efficiency 2-micron secondary filtration
- Adds an additional filter before the CP3 injection pump
- Glacier 3/8-inch Big Line Kit included
- Replaces the restrictive factory supply line
- High-quality fuel hose and fittings
- Laser-cut and CNC-formed Glacier mounting bracket
- Convenient under-hood filter location
- Easy-to-service spin-on filter design
- Supports stock and modified fuel systems
- Designed and manufactured by Glacier Diesel Power
Why Upgrade to the MK-2+?
The factory filtration system provides the truck’s primary fuel protection, but fine particulate contamination can still contribute to wear inside the CP3 and injectors over time.
The MK-2+ adds a dedicated secondary filter immediately before the high-pressure injection system while also removing one of the more restrictive sections of the factory supply plumbing.
This combination provides two important upgrades:
- Cleaner fuel: The FF5320 adds 2-micron secondary filtration before the CP3.
- Improved delivery: The 3/8-inch Big Line Kit reduces restriction between the factory filter housing and injection pump.
That makes the MK-2+ an excellent upgrade for daily drivers, tow rigs, work trucks, and performance builds.
Glacier Fuel System Tech Tip
A larger fuel line does not create fuel pressure on its own. Its job is to reduce unnecessary restriction so a healthy lift pump can deliver fuel more efficiently.
The Fleetguard FF5320 and 3/8-inch plumbing used in this system are designed to support approximately 100 GPH with less than 1 PSI of pressure differential, providing high-efficiency filtration without becoming an unnecessary restriction in properly configured systems.
Fuel delivery still depends on the condition of the lift pump, filters, tank pickup, electrical supply, and the rest of the fuel system. Monitoring supply pressure under load remains one of the best ways to evaluate overall system health.
Why Glacier Built It This Way
Glacier did not want customers to choose between improved filtration and improved fuel flow.
The MK-2+ combines both upgrades into one vehicle-specific system. The custom laser-cut and CNC-formed bracket positions the FF5320 securely near the intake manifold, while the Big Line Kit replaces the restrictive factory connection between the filter housing and CP3.
The result is a clean installation that provides:
- Additional CP3 and injector protection
- Reduced fuel-supply restriction
- Convenient filter servicing
- Quality vehicle-specific mounting
- Compatibility with stock and modified trucks
Applications
Fits:
- 2007.5 Dodge Ram 6.7L Cummins
- 2008 Dodge Ram 6.7L Cummins
- 2009 Dodge Ram 6.7L Cummins
Verify your truck’s fuel-system configuration before ordering.
Kit Contents
The Glacier Diesel Power MK-2+ Kit includes:
- Fleetguard FF5320 fuel filter
- Glacier vehicle-specific mounting bracket
- Glacier 3/8-inch Big Line Kit
- Fuel hose and fittings
- Mounting hardware
- Installation components
Important Notes
- Designed for 2007.5–2009 Dodge Ram trucks equipped with the 6.7L Cummins.
- Retains the factory primary fuel filter housing.
- Adds the FF5320 as a secondary filter before the CP3.
- Replaces the factory supply line between the filter housing and CP3.
- Prime the fuel system after installation.
- Inspect all connections for leaks before operating the engine.
- Recheck fittings and hose routing after the first complete heat cycle.
- Replace the FF5320 according to fuel quality, restriction, and recommended service intervals.
Common Failure Point
Fine contamination and restrictive supply plumbing can both affect long-term common-rail fuel-system reliability.
The factory filter remains the primary filtration stage, while the MK-2+ adds another layer of protection directly before the CP3. Replacing the restrictive supply line at the same time helps ensure the added filtration is not paired with one of the smallest sections of the original plumbing.
The MK-2+ will not correct a weak lift pump, plugged primary filter, contaminated fuel source, or unrelated fuel-system fault. Those components should still be inspected whenever low pressure or reduced performance is present.
Complete Your Fuel System
Complete your 6.7L Cummins fuel system with:
- Glacier Fuel Pressure Gauge and Sender
- Glacier Fuel Pressure Test Fittings
- Glacier Fuel Tank Vent Kit
- Replacement Fleetguard FF5320 Fuel Filters
- Glacier Fuel Boss Mechanical Lift Pump
- Glacier Twin Fuel Filter Systems
- Glacier Severe Service Fuel Filter Systems
- Glacier Fuel Return Line Upgrades