Glacier Diesel Power 2007.5–2009 Dodge Ram 6.7L Cummins Maximizer Big Line Kit (07509MAX)
Description
The factory in-tank lift pump on the 2007.5–2009 6.7L Cummins is often capable of supporting a healthy stock or mildly modified truck, but its output still has to pass through restrictive factory lines and fittings before fuel reaches the CP3 injection pump.
The Glacier Diesel Power Maximizer Big Line Kit was developed for owners who want to retain the factory in-tank lift pump while removing more of the restrictive plumbing surrounding the factory fuel filter housing.
Unlike Glacier’s standard Big Line Kit, which replaces the line from the filter housing to the CP3, the Maximizer upgrades both sides of the factory filter housing. The system replaces the connection from the factory steel supply line to the filter housing inlet, as well as the line from the filter housing outlet to the CP3 inlet.
Restrictive factory lines and banjo-style fittings are replaced with Glacier custom stainless-steel JIC adapters and full-size 3/8-inch fuel hose. This creates a larger, more serviceable fuel path while allowing the stock in-tank lift pump and factory filter housing to remain in their original locations.
For trucks that are not ready for a complete aftermarket fuel system, the Maximizer provides a practical way to improve the existing supply path without adding another electric pump, relocating filters, or replacing the entire system.
Features
- Fits 2007.5–2009 Dodge Ram 6.7L Cummins trucks
- Designed for trucks retaining the factory in-tank lift pump
- Retains the factory fuel filter housing
- Upgrades both the inlet and outlet sides of the filter housing
- Replaces the line from the factory steel supply line to the filter housing
- Replaces the line from the filter housing to the CP3 injection pump
- Full-size 3/8-inch fuel hose
- Custom Glacier stainless-steel JIC adapters
- Eliminates restrictive factory banjo-style connections
- Serviceable hose-and-fitting construction
- No drilled-out generic hydraulic adapters
- Excellent intermediate upgrade before installing a complete fuel system
Why Upgrade to the Maximizer System?
A larger line after the fuel filter can remove one important restriction, but the stock lift pump must still push fuel through the factory plumbing feeding the filter housing.
The Maximizer takes the upgrade one step further by addressing the restrictive connections on both sides of the factory filter. Fuel is given a larger path entering the filter housing and another larger path leaving the housing for the CP3.
This makes the Maximizer especially useful for owners who:
- Want to retain the factory in-tank lift pump
- Are not ready to purchase a complete aftermarket fuel system
- Want to improve the factory supply path without relocating components
- Use the truck for towing or other sustained-load operation
- Want serviceable fuel lines in place of the original restrictive plumbing
The Maximizer does not increase the pumping capacity of the factory lift pump. It allows a healthy pump to work through a less restrictive path.
Glacier Fuel System Tech Tip
Removing restriction and increasing pump output are not the same thing.
The factory in-tank lift pump determines how much pressure and volume the system can produce. The lines, fittings, fuel filter, and hose routing determine how much of that pressure is lost before fuel reaches the CP3.
The Maximizer is designed to reduce avoidable pressure loss through the factory plumbing. It cannot restore a worn pump, correct low voltage at the pump, or overcome a plugged fuel filter.
Fuel pressure should be tested at idle and under engine load. A weak pump may appear acceptable at idle but experience a substantial pressure drop during acceleration or towing.
Why Glacier Built It This Way
The goal of the Maximizer was not simply to replace one visible fuel hose. Glacier designed the system to address the complete section surrounding the factory filter housing.
Custom stainless-steel JIC adapters replace the restrictive factory connections without relying on drilled-out hydraulic fittings. Purpose-built adapters provide the proper thread engagement and sealing surfaces while maintaining a larger internal passage.
The factory fittings measure approximately 0.185 inch through the internal passage, while the Glacier fittings measure approximately 0.300 inch. Based on those published dimensions, the Glacier opening provides roughly 2.6 times the cross-sectional area of the original passage.
Full-size 3/8-inch hose connects the adapters and creates a serviceable system that can be inspected or replaced using conventional tools. The original in-tank pump, steel supply line, filter housing, and CP3 remain in their intended locations.
This keeps the upgrade straightforward while targeting the restrictive plumbing most likely to reduce the pressure available at the CP3 inlet.
Maximizer Versus Standard Big Line Kit
Both kits improve fuel delivery between the factory filter housing and the CP3, but they are not the same upgrade.
Standard Big Line Kit
The standard Big Line Kit replaces the restrictive line and fittings from the factory fuel filter housing to the CP3 injection pump.
It is appropriate when the primary goal is to improve the outlet side of the filter housing.
Maximizer Big Line Kit
The Maximizer replaces:
- The connection from the factory steel supply line to the fuel filter housing
- The connection from the fuel filter housing to the CP3
This addresses both the inlet and outlet sides of the factory filter housing and is the more complete option for trucks retaining the factory in-tank lift pump.
Applications and Fitment
Designed for:
- 2007.5 Dodge Ram 2500 6.7L Cummins
- 2007.5 Dodge Ram 3500 6.7L Cummins
- 2008 Dodge Ram 2500 6.7L Cummins
- 2008 Dodge Ram 3500 6.7L Cummins
- 2008 Dodge Ram 4500 6.7L Cummins
- 2008 Dodge Ram 5500 6.7L Cummins
- 2009 Dodge Ram 2500 6.7L Cummins
- 2009 Dodge Ram 3500 6.7L Cummins
- 2009 Dodge Ram 4500 6.7L Cummins
- 2009 Dodge Ram 5500 6.7L Cummins
Designed for trucks retaining the factory in-tank lift pump, factory steel supply line, factory fuel filter housing, and CP3 injection pump.
Important Notes
- This system is designed around the factory in-tank lift pump.
- The factory fuel filter housing remains in place.
- The kit upgrades the plumbing immediately before and after the filter housing.
- It does not replace the complete fuel line from the tank to the engine.
- A healthy and properly powered factory lift pump is required.
- The kit will not repair a worn or failed lift pump.
- It will not correct a plugged fuel filter, damaged tank module, electrical voltage loss, or restriction elsewhere in the system.
- Fuel-pressure results will vary based on pump condition, filter condition, fuel demand, and the rest of the supply system.
- Keep all fuel-system components clean during installation.
- Route hoses away from exhaust components, sharp edges, and moving parts.
- Inspect all connections for leaks after installation and after the first complete heat cycle.
Common Failure Point
The factory in-tank lift pump is frequently blamed whenever fuel pressure is lower than expected. While pump condition is important, restrictions in the lines and fittings can also contribute to pressure loss before fuel reaches the CP3.
On the 2007.5–2009 trucks, the restrictive plumbing exists on both sides of the factory filter housing. Upgrading only the line leading to the CP3 leaves the inlet side of the filter housing unchanged.
The Maximizer addresses both sections, but the system still depends on a healthy pump and clean fuel filter. A weak pump cannot be restored by installing larger lines, and a restricted filter can still cause low pressure regardless of hose diameter.
Complete Your Fuel System
Complete your 6.7L Cummins fuel system with:
- Glacier fuel-pressure gauge and sender
- Glacier fuel-pressure test fittings
- Replacement Fleetguard fuel filters
- Glacier Severe Service Twin Fuel Filter System
- Glacier Fuel Boss Mechanical Lift Pump
- Glacier complete performance fuel system
- Glacier stainless-steel fuel system adapters
Glacier Diesel Power 2007.5–2009 Dodge Ram 6.7L Cummins Maximizer Big Line Kit (07509MAX)
Description
The factory in-tank lift pump on the 2007.5–2009 6.7L Cummins is often capable of supporting a healthy stock or mildly modified truck, but its output still has to pass through restrictive factory lines and fittings before fuel reaches the CP3 injection pump.
The Glacier Diesel Power Maximizer Big Line Kit was developed for owners who want to retain the factory in-tank lift pump while removing more of the restrictive plumbing surrounding the factory fuel filter housing.
Unlike Glacier’s standard Big Line Kit, which replaces the line from the filter housing to the CP3, the Maximizer upgrades both sides of the factory filter housing. The system replaces the connection from the factory steel supply line to the filter housing inlet, as well as the line from the filter housing outlet to the CP3 inlet.
Restrictive factory lines and banjo-style fittings are replaced with Glacier custom stainless-steel JIC adapters and full-size 3/8-inch fuel hose. This creates a larger, more serviceable fuel path while allowing the stock in-tank lift pump and factory filter housing to remain in their original locations.
For trucks that are not ready for a complete aftermarket fuel system, the Maximizer provides a practical way to improve the existing supply path without adding another electric pump, relocating filters, or replacing the entire system.
Features
- Fits 2007.5–2009 Dodge Ram 6.7L Cummins trucks
- Designed for trucks retaining the factory in-tank lift pump
- Retains the factory fuel filter housing
- Upgrades both the inlet and outlet sides of the filter housing
- Replaces the line from the factory steel supply line to the filter housing
- Replaces the line from the filter housing to the CP3 injection pump
- Full-size 3/8-inch fuel hose
- Custom Glacier stainless-steel JIC adapters
- Eliminates restrictive factory banjo-style connections
- Serviceable hose-and-fitting construction
- No drilled-out generic hydraulic adapters
- Excellent intermediate upgrade before installing a complete fuel system
Why Upgrade to the Maximizer System?
A larger line after the fuel filter can remove one important restriction, but the stock lift pump must still push fuel through the factory plumbing feeding the filter housing.
The Maximizer takes the upgrade one step further by addressing the restrictive connections on both sides of the factory filter. Fuel is given a larger path entering the filter housing and another larger path leaving the housing for the CP3.
This makes the Maximizer especially useful for owners who:
- Want to retain the factory in-tank lift pump
- Are not ready to purchase a complete aftermarket fuel system
- Want to improve the factory supply path without relocating components
- Use the truck for towing or other sustained-load operation
- Want serviceable fuel lines in place of the original restrictive plumbing
The Maximizer does not increase the pumping capacity of the factory lift pump. It allows a healthy pump to work through a less restrictive path.
Glacier Fuel System Tech Tip
Removing restriction and increasing pump output are not the same thing.
The factory in-tank lift pump determines how much pressure and volume the system can produce. The lines, fittings, fuel filter, and hose routing determine how much of that pressure is lost before fuel reaches the CP3.
The Maximizer is designed to reduce avoidable pressure loss through the factory plumbing. It cannot restore a worn pump, correct low voltage at the pump, or overcome a plugged fuel filter.
Fuel pressure should be tested at idle and under engine load. A weak pump may appear acceptable at idle but experience a substantial pressure drop during acceleration or towing.
Why Glacier Built It This Way
The goal of the Maximizer was not simply to replace one visible fuel hose. Glacier designed the system to address the complete section surrounding the factory filter housing.
Custom stainless-steel JIC adapters replace the restrictive factory connections without relying on drilled-out hydraulic fittings. Purpose-built adapters provide the proper thread engagement and sealing surfaces while maintaining a larger internal passage.
The factory fittings measure approximately 0.185 inch through the internal passage, while the Glacier fittings measure approximately 0.300 inch. Based on those published dimensions, the Glacier opening provides roughly 2.6 times the cross-sectional area of the original passage.
Full-size 3/8-inch hose connects the adapters and creates a serviceable system that can be inspected or replaced using conventional tools. The original in-tank pump, steel supply line, filter housing, and CP3 remain in their intended locations.
This keeps the upgrade straightforward while targeting the restrictive plumbing most likely to reduce the pressure available at the CP3 inlet.
Maximizer Versus Standard Big Line Kit
Both kits improve fuel delivery between the factory filter housing and the CP3, but they are not the same upgrade.
Standard Big Line Kit
The standard Big Line Kit replaces the restrictive line and fittings from the factory fuel filter housing to the CP3 injection pump.
It is appropriate when the primary goal is to improve the outlet side of the filter housing.
Maximizer Big Line Kit
The Maximizer replaces:
- The connection from the factory steel supply line to the fuel filter housing
- The connection from the fuel filter housing to the CP3
This addresses both the inlet and outlet sides of the factory filter housing and is the more complete option for trucks retaining the factory in-tank lift pump.
Applications and Fitment
Designed for:
- 2007.5 Dodge Ram 2500 6.7L Cummins
- 2007.5 Dodge Ram 3500 6.7L Cummins
- 2008 Dodge Ram 2500 6.7L Cummins
- 2008 Dodge Ram 3500 6.7L Cummins
- 2008 Dodge Ram 4500 6.7L Cummins
- 2008 Dodge Ram 5500 6.7L Cummins
- 2009 Dodge Ram 2500 6.7L Cummins
- 2009 Dodge Ram 3500 6.7L Cummins
- 2009 Dodge Ram 4500 6.7L Cummins
- 2009 Dodge Ram 5500 6.7L Cummins
Designed for trucks retaining the factory in-tank lift pump, factory steel supply line, factory fuel filter housing, and CP3 injection pump.
Important Notes
- This system is designed around the factory in-tank lift pump.
- The factory fuel filter housing remains in place.
- The kit upgrades the plumbing immediately before and after the filter housing.
- It does not replace the complete fuel line from the tank to the engine.
- A healthy and properly powered factory lift pump is required.
- The kit will not repair a worn or failed lift pump.
- It will not correct a plugged fuel filter, damaged tank module, electrical voltage loss, or restriction elsewhere in the system.
- Fuel-pressure results will vary based on pump condition, filter condition, fuel demand, and the rest of the supply system.
- Keep all fuel-system components clean during installation.
- Route hoses away from exhaust components, sharp edges, and moving parts.
- Inspect all connections for leaks after installation and after the first complete heat cycle.
Common Failure Point
The factory in-tank lift pump is frequently blamed whenever fuel pressure is lower than expected. While pump condition is important, restrictions in the lines and fittings can also contribute to pressure loss before fuel reaches the CP3.
On the 2007.5–2009 trucks, the restrictive plumbing exists on both sides of the factory filter housing. Upgrading only the line leading to the CP3 leaves the inlet side of the filter housing unchanged.
The Maximizer addresses both sections, but the system still depends on a healthy pump and clean fuel filter. A weak pump cannot be restored by installing larger lines, and a restricted filter can still cause low pressure regardless of hose diameter.
Complete Your Fuel System
Complete your 6.7L Cummins fuel system with:
- Glacier fuel-pressure gauge and sender
- Glacier fuel-pressure test fittings
- Replacement Fleetguard fuel filters
- Glacier Severe Service Twin Fuel Filter System
- Glacier Fuel Boss Mechanical Lift Pump
- Glacier complete performance fuel system
- Glacier stainless-steel fuel system adapters