Glacier Diesel Power 2003–2005 Dodge Ram 5.9L Cummins MK-2 High Flow Fuel Filter & 3/8" Big Line Kit – APPS Mount (MK20305-APPS)
Description
Protecting the CP3 injection pump starts with clean, unrestricted fuel. The Glacier Diesel Power MK-2 High Flow Fuel Filter & Big Line Kit is designed specifically for 2003–2005 Dodge Ram 5.9L Cummins trucks equipped with the engine-mounted APPS (Accelerator Pedal Position Sensor), delivering improved filtration and increased fuel flow in one complete system.
The MK-2 system adds a genuine Fleetguard FF5320 high-efficiency fuel filter between the factory fuel filter housing and the CP3 injection pump, providing an additional level of filtration before fuel reaches one of the most expensive components in your fuel system. At the same time, Glacier's 3/8-inch Big Line Kit replaces the restrictive factory supply line with high-flow hose and fittings to improve fuel delivery without sacrificing filtration.
Designed for trucks ranging from stock daily drivers to high-performance builds, the MK-2 delivers the clean fuel and increased flow your common rail Cummins demands.
Features
- Fits 2003–2005 Dodge Ram 2500 & 3500 5.9L Cummins
- Specifically designed for engine-mounted APPS applications
- Genuine Fleetguard FF5320 high-efficiency fuel filter
- Glacier 3/8-inch Big Line Kit included
- Adds secondary filtration before the CP3 injection pump
- Replaces the restrictive factory supply line
- Laser-cut and CNC-formed steel APPS mounting bracket
- Factory-style fit and clean engine bay appearance
- Supports stock and high-performance applications
- Made in the USA by Glacier Diesel Power
Why Upgrade to the MK-2 + Big Line Kit?
The factory fuel system does a good job, but it still allows fine contaminants to reach the CP3 injection pump.
The MK-2 adds a second stage of filtration using the proven Fleetguard FF5320 while simultaneously increasing fuel flow with Glacier's 3/8-inch Big Line Kit.
This combination helps:
- Improve fuel cleanliness
- Increase fuel flow to the CP3
- Reduce restriction between the factory filter housing and injection pump
- Support higher horsepower applications
- Extend the life of expensive fuel-system components
Glacier Tech Tip
The Fleetguard FF5320 is one of the most trusted secondary fuel filters used on Cummins common rail engines.
Combined with Glacier's high-flow 3/8-inch fuel line, the system is capable of supporting nearly any level of performance modification while maintaining minimal restriction. The FF5320 flows close to 100 GPH with less than 1 PSI of pressure drop at its rated capacity, providing excellent filtration without sacrificing fuel delivery.
Why Glacier Built It This Way
Rather than asking customers to choose between better filtration or better fuel flow, Glacier combined both into one system.
The MK-2 uses a laser-cut and CNC-formed steel mounting bracket that positions the filter securely on trucks equipped with the engine-mounted APPS. The included Big Line Kit removes one of the most restrictive sections of the factory fuel system, creating a cleaner, higher-flow path to the CP3 injection pump.
The result is a complete upgrade that's easy to service, simple to install, and built to support everything from stock trucks to serious performance applications.
Applications
Fits:
- 2003 Dodge Ram 2500 5.9L Cummins
- 2003 Dodge Ram 3500 5.9L Cummins
- 2004 Dodge Ram 2500 5.9L Cummins
- 2004 Dodge Ram 3500 5.9L Cummins
- 2005 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
This kit is only for trucks equipped with the engine-mounted APPS and is NOT compatible with trucks equipped with a Jacobs Exhaust Brake. If you're unsure which APPS configuration your truck has, compare it to the product photos before ordering.
Kit Contents
The Glacier Diesel Power MK-2 APPS Mount Kit includes:
- Fleetguard FF5320 fuel filter
- APPS-specific mounting bracket
- Glacier 3/8-inch Big Line Kit
- Fuel hose and fittings
- Mounting hardware
- Installation components
Important Notes
- Fits 2003–2005 5.9L Cummins with engine-mounted APPS only.
- Not compatible with trucks equipped with Jacobs Exhaust Brakes.
- Designed for 5.9L Common Rail Cummins applications only.
- Prime the fuel system after installation.
- Inspect all fuel connections for leaks before operating the engine.
Common Failure Point
Fine fuel contamination and restrictive factory plumbing can shorten the life of expensive common rail fuel-system components.
Adding a high-efficiency secondary filter while increasing fuel flow helps provide cleaner fuel to the CP3 injection pump without introducing unnecessary restriction. Routine filter replacement is one of the simplest ways to help protect the fuel system over the life of the truck.
Complete Your Fuel System
Complete your Common Rail fuel system with:
- Glacier Fuel Boss Mechanical Lift Pump
- Glacier Fuel Pressure Gauge and Sender
- Glacier Fuel Pressure Test Fittings
- Glacier Fuel Tank Vent Kit
- Replacement Fleetguard FF5320 Fuel Filters
- Glacier Big Line Accessories
- Glacier Fuel Return Line Upgrades
Glacier Diesel Power 2003–2005 Dodge Ram 5.9L Cummins MK-2 High Flow Fuel Filter & 3/8" Big Line Kit – APPS Mount (MK20305-APPS)
Description
Protecting the CP3 injection pump starts with clean, unrestricted fuel. The Glacier Diesel Power MK-2 High Flow Fuel Filter & Big Line Kit is designed specifically for 2003–2005 Dodge Ram 5.9L Cummins trucks equipped with the engine-mounted APPS (Accelerator Pedal Position Sensor), delivering improved filtration and increased fuel flow in one complete system.
The MK-2 system adds a genuine Fleetguard FF5320 high-efficiency fuel filter between the factory fuel filter housing and the CP3 injection pump, providing an additional level of filtration before fuel reaches one of the most expensive components in your fuel system. At the same time, Glacier's 3/8-inch Big Line Kit replaces the restrictive factory supply line with high-flow hose and fittings to improve fuel delivery without sacrificing filtration.
Designed for trucks ranging from stock daily drivers to high-performance builds, the MK-2 delivers the clean fuel and increased flow your common rail Cummins demands.
Features
- Fits 2003–2005 Dodge Ram 2500 & 3500 5.9L Cummins
- Specifically designed for engine-mounted APPS applications
- Genuine Fleetguard FF5320 high-efficiency fuel filter
- Glacier 3/8-inch Big Line Kit included
- Adds secondary filtration before the CP3 injection pump
- Replaces the restrictive factory supply line
- Laser-cut and CNC-formed steel APPS mounting bracket
- Factory-style fit and clean engine bay appearance
- Supports stock and high-performance applications
- Made in the USA by Glacier Diesel Power
Why Upgrade to the MK-2 + Big Line Kit?
The factory fuel system does a good job, but it still allows fine contaminants to reach the CP3 injection pump.
The MK-2 adds a second stage of filtration using the proven Fleetguard FF5320 while simultaneously increasing fuel flow with Glacier's 3/8-inch Big Line Kit.
This combination helps:
- Improve fuel cleanliness
- Increase fuel flow to the CP3
- Reduce restriction between the factory filter housing and injection pump
- Support higher horsepower applications
- Extend the life of expensive fuel-system components
Glacier Tech Tip
The Fleetguard FF5320 is one of the most trusted secondary fuel filters used on Cummins common rail engines.
Combined with Glacier's high-flow 3/8-inch fuel line, the system is capable of supporting nearly any level of performance modification while maintaining minimal restriction. The FF5320 flows close to 100 GPH with less than 1 PSI of pressure drop at its rated capacity, providing excellent filtration without sacrificing fuel delivery.
Why Glacier Built It This Way
Rather than asking customers to choose between better filtration or better fuel flow, Glacier combined both into one system.
The MK-2 uses a laser-cut and CNC-formed steel mounting bracket that positions the filter securely on trucks equipped with the engine-mounted APPS. The included Big Line Kit removes one of the most restrictive sections of the factory fuel system, creating a cleaner, higher-flow path to the CP3 injection pump.
The result is a complete upgrade that's easy to service, simple to install, and built to support everything from stock trucks to serious performance applications.
Applications
Fits:
- 2003 Dodge Ram 2500 5.9L Cummins
- 2003 Dodge Ram 3500 5.9L Cummins
- 2004 Dodge Ram 2500 5.9L Cummins
- 2004 Dodge Ram 3500 5.9L Cummins
- 2005 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
This kit is only for trucks equipped with the engine-mounted APPS and is NOT compatible with trucks equipped with a Jacobs Exhaust Brake. If you're unsure which APPS configuration your truck has, compare it to the product photos before ordering.
Kit Contents
The Glacier Diesel Power MK-2 APPS Mount Kit includes:
- Fleetguard FF5320 fuel filter
- APPS-specific mounting bracket
- Glacier 3/8-inch Big Line Kit
- Fuel hose and fittings
- Mounting hardware
- Installation components
Important Notes
- Fits 2003–2005 5.9L Cummins with engine-mounted APPS only.
- Not compatible with trucks equipped with Jacobs Exhaust Brakes.
- Designed for 5.9L Common Rail Cummins applications only.
- Prime the fuel system after installation.
- Inspect all fuel connections for leaks before operating the engine.
Common Failure Point
Fine fuel contamination and restrictive factory plumbing can shorten the life of expensive common rail fuel-system components.
Adding a high-efficiency secondary filter while increasing fuel flow helps provide cleaner fuel to the CP3 injection pump without introducing unnecessary restriction. Routine filter replacement is one of the simplest ways to help protect the fuel system over the life of the truck.
Complete Your Fuel System
Complete your Common Rail fuel system with:
- Glacier Fuel Boss Mechanical Lift Pump
- Glacier Fuel Pressure Gauge and Sender
- Glacier Fuel Pressure Test Fittings
- Glacier Fuel Tank Vent Kit
- Replacement Fleetguard FF5320 Fuel Filters
- Glacier Big Line Accessories
- Glacier Fuel Return Line Upgrades