Remanufactured DS4 Injection Pump - With PMD and ULSD Upgrade
All computer operated 6.5L diesels had the DS4 injection pump starting in 1994. If you are unsure of what model you need, please read the ID # off your existing pump or contact us before ordering. All model numbers other than 5068 are compatible with a 5521 replacement.
What makes this pump stand out from the rest?
- Stanadyne ULSD upgrade kit installed (see below)
- OEM Stanadyne authorized rebuild quality. No substitutes. No aftermarket parts
- Calibrated to OEM 5521S Specifications
We only use the best components available including the genuine Stanadyne ULSD upgrade kits ($175 value). The "S" at the END of the model number indicates a pump has been updated (5521S, 5068S, etc). An "S" before the model number does not mean a pump has this update. When comparing our pumps to others, keep this in mind because the term "upgraded" can be deceiving!
The following image shows the upgraded ULSD fuel solenoid control parts (bottom) vs OEM parts. The low-friction coating and design changes stand out.
These particular pumps are rebuilt and tested by a certified Stanadyne tech, in the USA, using ISO calibrated equipment. They are electronically flow tested with the correct PMD calibration resistor (included) to ensure they'll perform on your vehicle and drop-in without issue.
These come with an OEM Stanadyne Grey PMD, gold plated connections, and resistor that was selected during bench testing and matched to the pump for proper fuel calibration. Suitable core return is required with all re-manufactured pump orders, and a pre-paid return shipping label is included in the price.
2 Year Manufacturer Warranty from date of delivery.