Glacier Diesel Power 1998.5–2002 Dodge Ram 5.9L Cummins Air-Boss VP Intake Plenum (98502-ABIP)
Description
High EGTs and uneven airflow distribution have long been concerns on modified 1998.5–2002 5.9L Cummins engines, especially as fueling and turbocharger performance increase.
The Glacier Diesel Power Air-Boss VP Intake Plenum was engineered to address those restrictions by increasing available airflow through the factory intake plenum while directing more air toward cylinders 4, 5, and 6.
The Air-Boss VP isn't simply a flat aluminum replacement plate. Its internally elevated design creates additional room inside the intake plenum, while specially designed turning ramps at the plenum entrance help incoming air transition into the intake plenum and toward the rear cylinders.
The result is an increase of approximately 20% in available plenum area toward the rear cylinders, helping improve airflow distribution, reduce EGTs, and support increased fueling.
For Cummins owners looking for a serious bolt-on airflow improvement without milling the factory cast plenum from the cylinder head and installing a fabricated intake system, the Air-Boss VP provides a proven Glacier Diesel Power solution.
Features
- Designed specifically for 1998.5–2002 Dodge Ram 5.9L Cummins
- Part Number: 98502-ABIP
- Internally elevated Air-Boss VP plenum design
- Approximately 20% more available plenum area toward the rear cylinders
- Designed to improve airflow toward cylinders 4, 5, and 6
- Integrated turning ramps help improve incoming airflow transition
- Helps reduce intake restriction
- Designed to help reduce EGTs
- Supports increased fueling and performance modifications
- Maintains factory intercooler piping-to-intake manifold geometry
- Compatible with stock mounting hardware
- Compatible with stock and aftermarket intake manifolds
- Multiple grid heater configurations available
Why Upgrade to the Air-Boss VP?
The factory intake system has limited room to distribute incoming air across all six cylinders. As airflow and fueling demands increase, getting enough air toward the rear cylinders becomes increasingly important.
That's where the Air-Boss VP is different from a basic intake plate.
Rather than simply replacing the factory cover with another flat plate, the Air-Boss VP increases the usable area inside the intake plenum and incorporates turning ramps to help direct incoming air through the transition area.
By opening up the plenum area toward the rear cylinders by approximately 20%, the Air-Boss VP helps provide the additional airflow needed to support higher fueling levels while helping control EGTs.
More Than a Flat Intake Plate
There are simpler ways to replace the factory intake plate.
The Air-Boss VP was designed for customers who want more airflow, not simply a different-looking plate.
Its internally elevated design takes advantage of the available space above the cylinder head to increase plenum area while the entrance ramps help incoming air make the transition toward the rear cylinders.
For customers looking for the largest practical bolt-on airflow improvement without cutting the factory intake plenum from the cylinder head, the Air-Boss VP provides a proven alternative.
Maintains Proper Intake Geometry
Increasing the height of the intake plenum creates another challenge: maintaining the proper relationship between the intercooler piping and intake manifold.
Glacier Diesel Power addressed this with a custom-height grid heater delete block designed specifically around the Air-Boss VP.
This maintains the factory intercooler piping-to-intake manifold connection geometry, allowing the Air-Boss VP to remain compatible with stock mounting hardware and aftermarket intake manifolds.
Grid Heater Options
The Air-Boss VP is available in multiple configurations depending on how your truck is used.
Grid Heater Delete
The standard Air-Boss VP configuration includes a custom-height grid heater delete block designed to maintain the correct intake geometry.
Factory Grid Heater
For customers operating in colder climates, the Air-Boss VP can be configured to retain the factory grid heater. This configuration uses custom-length stainless steel studs to accommodate the increased plenum height.
Grid Heater + Delete Block
For customers who want the ability to switch between the factory grid heater and delete configuration, an option is available that includes the necessary components for both setups.
Glacier Tech Tip
The Air-Boss VP becomes increasingly beneficial as additional fueling and airflow modifications are added to the truck.
Larger injectors, upgraded turbochargers, increased fueling, and high-load applications all increase the amount of air the engine needs. Improving airflow toward the rear cylinders helps the engine make better use of those modifications while controlling EGTs.
And because the Air-Boss VP maintains the proper intake geometry, it can be combined with stock or aftermarket intake manifolds for an even more complete airflow upgrade.
Why Choose Glacier Diesel Power?
The Air-Boss VP represents the same philosophy behind Glacier Diesel Power's later Air-Boss products: don't just remove a restriction—engineer a better solution.
Instead of simply producing a flat replacement plate, the Air-Boss VP was designed to increase usable plenum area, improve the airflow transition into the intake manifold, and provide additional airflow where the 5.9L Cummins needs it most.
It's a proven design created specifically for the VP44-era Cummins platform.
Purpose-built. Performance proven. Engineered by Glacier Diesel Power.
Applications
Designed for:
- 1998.5 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 1999 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 2000 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 2001 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 2002 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
Kit Contents
Kit contents vary depending on the selected grid heater configuration and may include:
- Glacier Diesel Power Air-Boss VP Intake Plenum Plate
- Factory-style gaskets
- Custom-height grid heater delete block
- Custom-length stainless steel grid heater studs when applicable
Important Notes
- Fits 1998.5–2002 Dodge Ram 5.9L 24-Valve Cummins applications.
- Part Number: 98502-ABIP
- Provides approximately 20% more available plenum area toward the rear cylinders.
- Compatible with stock mounting hardware.
- Compatible with stock and aftermarket intake manifolds.
- Standard configuration includes a custom-height grid heater delete block.
- Factory grid heater retention configurations are available for colder climates.
- Kit contents vary based on the selected grid heater option.
- Does NOT ship to California.
Complete Your Intake System
Pair the Air-Boss VP with:
- Glacier Diesel Power 5.9L Cummins Intake Manifold
- Glacier Diesel Power Boost Bolt
- Glacier Diesel Power MK-7 Fuel System
- Glacier Diesel Power MK-10 Fuel System
- Glacier Diesel Power Maximizer Big Line Kit
Glacier Diesel Power 1998.5–2002 Dodge Ram 5.9L Cummins Air-Boss VP Intake Plenum (98502-ABIP)
Description
High EGTs and uneven airflow distribution have long been concerns on modified 1998.5–2002 5.9L Cummins engines, especially as fueling and turbocharger performance increase.
The Glacier Diesel Power Air-Boss VP Intake Plenum was engineered to address those restrictions by increasing available airflow through the factory intake plenum while directing more air toward cylinders 4, 5, and 6.
The Air-Boss VP isn't simply a flat aluminum replacement plate. Its internally elevated design creates additional room inside the intake plenum, while specially designed turning ramps at the plenum entrance help incoming air transition into the intake plenum and toward the rear cylinders.
The result is an increase of approximately 20% in available plenum area toward the rear cylinders, helping improve airflow distribution, reduce EGTs, and support increased fueling.
For Cummins owners looking for a serious bolt-on airflow improvement without milling the factory cast plenum from the cylinder head and installing a fabricated intake system, the Air-Boss VP provides a proven Glacier Diesel Power solution.
Features
- Designed specifically for 1998.5–2002 Dodge Ram 5.9L Cummins
- Part Number: 98502-ABIP
- Internally elevated Air-Boss VP plenum design
- Approximately 20% more available plenum area toward the rear cylinders
- Designed to improve airflow toward cylinders 4, 5, and 6
- Integrated turning ramps help improve incoming airflow transition
- Helps reduce intake restriction
- Designed to help reduce EGTs
- Supports increased fueling and performance modifications
- Maintains factory intercooler piping-to-intake manifold geometry
- Compatible with stock mounting hardware
- Compatible with stock and aftermarket intake manifolds
- Multiple grid heater configurations available
Why Upgrade to the Air-Boss VP?
The factory intake system has limited room to distribute incoming air across all six cylinders. As airflow and fueling demands increase, getting enough air toward the rear cylinders becomes increasingly important.
That's where the Air-Boss VP is different from a basic intake plate.
Rather than simply replacing the factory cover with another flat plate, the Air-Boss VP increases the usable area inside the intake plenum and incorporates turning ramps to help direct incoming air through the transition area.
By opening up the plenum area toward the rear cylinders by approximately 20%, the Air-Boss VP helps provide the additional airflow needed to support higher fueling levels while helping control EGTs.
More Than a Flat Intake Plate
There are simpler ways to replace the factory intake plate.
The Air-Boss VP was designed for customers who want more airflow, not simply a different-looking plate.
Its internally elevated design takes advantage of the available space above the cylinder head to increase plenum area while the entrance ramps help incoming air make the transition toward the rear cylinders.
For customers looking for the largest practical bolt-on airflow improvement without cutting the factory intake plenum from the cylinder head, the Air-Boss VP provides a proven alternative.
Maintains Proper Intake Geometry
Increasing the height of the intake plenum creates another challenge: maintaining the proper relationship between the intercooler piping and intake manifold.
Glacier Diesel Power addressed this with a custom-height grid heater delete block designed specifically around the Air-Boss VP.
This maintains the factory intercooler piping-to-intake manifold connection geometry, allowing the Air-Boss VP to remain compatible with stock mounting hardware and aftermarket intake manifolds.
Grid Heater Options
The Air-Boss VP is available in multiple configurations depending on how your truck is used.
Grid Heater Delete
The standard Air-Boss VP configuration includes a custom-height grid heater delete block designed to maintain the correct intake geometry.
Factory Grid Heater
For customers operating in colder climates, the Air-Boss VP can be configured to retain the factory grid heater. This configuration uses custom-length stainless steel studs to accommodate the increased plenum height.
Grid Heater + Delete Block
For customers who want the ability to switch between the factory grid heater and delete configuration, an option is available that includes the necessary components for both setups.
Glacier Tech Tip
The Air-Boss VP becomes increasingly beneficial as additional fueling and airflow modifications are added to the truck.
Larger injectors, upgraded turbochargers, increased fueling, and high-load applications all increase the amount of air the engine needs. Improving airflow toward the rear cylinders helps the engine make better use of those modifications while controlling EGTs.
And because the Air-Boss VP maintains the proper intake geometry, it can be combined with stock or aftermarket intake manifolds for an even more complete airflow upgrade.
Why Choose Glacier Diesel Power?
The Air-Boss VP represents the same philosophy behind Glacier Diesel Power's later Air-Boss products: don't just remove a restriction—engineer a better solution.
Instead of simply producing a flat replacement plate, the Air-Boss VP was designed to increase usable plenum area, improve the airflow transition into the intake manifold, and provide additional airflow where the 5.9L Cummins needs it most.
It's a proven design created specifically for the VP44-era Cummins platform.
Purpose-built. Performance proven. Engineered by Glacier Diesel Power.
Applications
Designed for:
- 1998.5 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 1999 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 2000 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 2001 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
- 2002 Dodge Ram 2500 & 3500 5.9L 24-Valve Cummins
Kit Contents
Kit contents vary depending on the selected grid heater configuration and may include:
- Glacier Diesel Power Air-Boss VP Intake Plenum Plate
- Factory-style gaskets
- Custom-height grid heater delete block
- Custom-length stainless steel grid heater studs when applicable
Important Notes
- Fits 1998.5–2002 Dodge Ram 5.9L 24-Valve Cummins applications.
- Part Number: 98502-ABIP
- Provides approximately 20% more available plenum area toward the rear cylinders.
- Compatible with stock mounting hardware.
- Compatible with stock and aftermarket intake manifolds.
- Standard configuration includes a custom-height grid heater delete block.
- Factory grid heater retention configurations are available for colder climates.
- Kit contents vary based on the selected grid heater option.
- Does NOT ship to California.
Complete Your Intake System
Pair the Air-Boss VP with:
- Glacier Diesel Power 5.9L Cummins Intake Manifold
- Glacier Diesel Power Boost Bolt
- Glacier Diesel Power MK-7 Fuel System
- Glacier Diesel Power MK-10 Fuel System
- Glacier Diesel Power Maximizer Big Line Kit