BRAND NEW

2003 - 2007 Dodge 5.9L Cummins

Jake Brake Vacuum Pump Pulley

OEM Investigation into why the original vacuum pumps for this application

had such a high failure rate indicated that the vacuum pump was turning

at too high of an RPM.  The factory re-designed the pump with a slightly

larger pulley so that the pump runs in the correct RPM range for maximum

life expectancy. 

We are now able to offer just the pulley by itself - this is a relatively

simple upgrade that can save your OEM pump from self-destructing.

Part Number

3965926

This part is discontinued from Cummins.
No change in belt size is required.

Fits the following vacuum pump part numbers (and others):

3965925 5102084AA