Remanufactured DS4 Injection Pump - With 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?

Tier 2 Rebuild:

This pump is our Tier 2 rebuild, a step above the rest, featuring:

• Stanadyne ULSD upgrade kit installed (see below)
• OEM Stanadyne authorized rebuild quality. No substitutes. No aftermarket parts
  • Calibrated to OEM 5521S Specifications
• New Timing Stepper Motor

We only use the best components available including the genuine Stanadyne ULSD (Ultra Low Sulfur Diesel) 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 it's a key differentiating feature.

The following image shows the upgraded ULSD fuel solenoid control parts (bottom) vs OEM parts.  The low-friction coating and design changes stand out.

Rebuilt and tested by a certified Stanadyne tech, in the USA, using ISO calibrated equipment. They are electronically flow tested to ensure they'll perform on your vehicle and drop-in without issue.

These come with gold plated PMD connection (grey plug)

Suitable core return is required (see terms & conditions)

1 Year Warranty from date of delivery