Alliant Power AP55121 is a remanufactured fuel injector for the Cummins ISB 6.7L. Alliant lists it for 2007 to 2009 mid-range use, and for 2007 to 2010 Dodge 6.7L ISB trucks it calls ‘crew cab’.
This is not Alliant’s pickup number: for 2007 to 2012 pickups, Alliant lists AP55120. For 2010 to 2016 mid-range engines, Alliant lists AP55122. Order by your truck and engine.
Confirm Fitment Before You Order
Call 530-668-0818 with your VIN or engine serial number and we will confirm it is the right part before anything ships.
Specifications
| Part number | AP55121 |
|---|---|
| Brand | Alliant Power |
| Condition | Remanufactured |
| Engine | Cummins ISB 6.7L |
| Core charge | Refundable in full when we receive your rebuildable core |
| Shipping weight | 2 lb |
Fits / Applications
- 2007 to 2009 Cummins ISB 6.7L mid-range
- 2007 to 2010 Dodge, Cummins ISB 6.7L, listed by Alliant as ‘crew cab’ (not its pickup listing; 2007 to 2012 pickups are AP55120)
Part Numbers & Cross Reference
Frequently Asked Questions
Which trucks does AP55121 fit?
Alliant Power lists it for 2007 to 2009 Cummins ISB 6.7L mid-range use, and for 2007 to 2010 Dodge 6.7L ISB trucks it calls ‘crew cab’. It is not Alliant’s pickup number.
I have a 2007 to 2012 6.7L pickup. Is AP55121 right?
Alliant lists a different number, AP55120, for 2007 to 2012 6.7L pickups. If you are not sure which one your truck needs, call us with your VIN.
Is AP55121 new or remanufactured?
Remanufactured. It is an Alliant Power remanufactured injector.
Ships by UPS to all 50 states, including Alaska and Hawaii. Your rate shows at checkout. A refundable core charge is added at checkout.


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