Call us

Cummins 4B (3.9L) Aftercooler Part: 3919805

Cummins 4B (3.9L) Aftercooler Part: 3919805



SKU: BBMC126 Category:
Weight1 lbs


Equipment Application

4B (3.9L)


Interstate McBee

Part Number


You’ve come to the right place for all of your heavy duty diesel engine needs. We here at Big Bear Engine Company are old school machine shop guys that know the value of your time whether it be out in the field for an industrial job or at play with an off-road engine swap. We are machine shop guys and guarantee the workmanship of all of our parts including: CUMMINS 4B (3.9L) AFTERCOOLER PART: 3919805.


Big Bear Engine Company Buyer's Guide

Need help researching a 4BT swap?

Get the FREE 10-page buyer's guide