5566837 Cummins Aftercooler Complete Assembly

• This part is in stock and ready to ship globally. 
• Offered is our replacement for the 5566837  Cummins Aftercooler Complete Assembly for the 8.3L C Series.
• This part is guaranteed for fit and function and carries a 2 year warranty per our terms and conditions. 
• We have decades of know how that have gone into this product

What do you get? 

• When you open the box you get: 
• Aftercooler Housing
• We have spent quite a bit of time perfecting the configuration. The housing you receive will mimic the fit and function of the unit that is currently installed.
• This unit will mount in the exact same location using the same threaded ports as your original. This unit WILL NOT come with replacement mounting hardware. However, you will be able to reuse your current hardware without issue.
• Aftercooler Core
• This part is made with OEM Equivalent Materials, Design and Manufacturing Methods.
• Tubing used is CuNi (Copper Nickel) which is the new industry standard. This material is a significant improvement over the standard copper tubes that are on all original units. The addition of nickel to copper significantly enhances the ability to withstand corrosive environments. It forms a more protective surface film. This will help to reduce pitting, crevice corrosion, and stress corrosion cracking.
• The Fin count is 30FPI as with the OEM
• Our headers our made with extruded billet brass
• This is better brass material than from other parts of the world where only one substandard brass is allowed for export.
• Or they use machined cast headers which have a lower density likely leading to a shorter product life.
• A tube of lubricant and a brush for application.  
• Using lubricant makes it easier to install the part and then remove it when doing your regular maintenance. 
• Two sets of 0-rings (in different diameters).
• Smaller which matches the OEM offering plus a larger cross section which may compensate for a worn housing as your system ages.
• Pre-installed core stabilizers
• Although this is disregarded by some YouTube installers these stabilizers are quite important. They perform 2 functions:
• 1. Reducing vibration at the tube header connection which has the potential of extending the cooler life and keep the area below the header from becoming embrittled. 
• 2. Reducing air bypass at the cooler extents. 

 Some details to note:   

• This assembly will come with the following components:
• Housing
• Aftercooler Core
• O-Rings
• Lube Kit
• Please note that end caps for this unit will be available in January (Cummins Part #: 3919856).

Our product is a drop in replacement for these part numbers:

• Cummins Aftercooler Complete Assembly: 5566836
• Cummins Aftercooler Complete Assembly: 5566837
• Cummins Aftercooler Complete Assembly: 5261994
• Cummins Aftercooler Complete Assembly: 4989471

All assembly numbers for reference:

• The entire assembly part number list is below for reference
• Complete Assembly
• 5566836
• 5566837
• 5261994
• 4989471
• Housing
• 3974399
• 4989468
• Core
• 4025340
• 4078413
• End Cap
• 3919856
• Core Stabilizers
• O-Rings

This part fits the following engines:

• Cummins 8.3L C Series