DS4 Electronic Injection Pump - NEW
Brand new, DS4831-5521S ULSD upgraded injection pump. Grey PMD included.
The pumps in this listing are New Old Stock (NOS), meaning they have build dates in the past. They've never been on a motor and have been freshly serviced, re-sealed and run on the test bench. These are no longer produced by Stanadyne so quantities are limited and may never show up again.
Currently out of stock and not expected to return since they are no longer being produced.
All model numbers other than 5068 are compatible with a 5521 replacement. If you have a 5068, you can run this pump with a tune update to match it.
NO CORE RETURN REQUIRED since this is a 100% new pump.