This is the Alliant Power AP90951, a Holset HE400VG turbocharger for the Cummins X15, remanufactured by Alliant Power and supplied with the actuator fitted. It replaces Cummins 5459710RX plus its actuator. Earlier ISX15 engines take different turbos with different numbers. Call 530-668-0818 with your engine serial number, CPL and the number on your turbo data plate and we will match it before you order.
| Part number | AP90951 |
| Brand | Alliant Power |
| Condition | Remanufactured by Alliant Power, actuator included |
| Turbo model | Holset HE400VG |
| Application | Cummins X15 (CM2450). Confirm by engine serial number and CPL. |
| Without-actuator version | Alliant Power AP90051 |
| Warranty | Alliant Power 24-month, unlimited-mileage warranty. |
| Core charge | Refundable in full when we receive your rebuildable core |
Vehicle & Equipment Fitment
Fitment is matched by engine, not by truck. This turbo is for the Cummins X15 (CM2450). Call 530-668-0818 with your engine serial number and CPL and we will confirm it before you order. The check is free.
Fits / Applications
- Cummins X15 (CM2450). Confirm by engine serial number and CPL before ordering.
- Actuator included
Cross Reference: Part Numbers This Covers
- Cummins 5459710RX, 5459710
- Holset 5458936HX
- Alliant Power AP90051 (same turbo without actuator)
- Cummins sells 5459710RX and Holset sells 5458936HX as the turbo without the actuator. This unit includes the actuator.
Why do I see this turbo cheaper online?
Short answer: it is usually not the same part, and a failed turbo can damage the engine. Read why ↓
Search any OE number and eBay, Amazon and a dozen storefronts will show it well under dealer cost, sold by outfits with no name, no address and no phone number. We lose business to those listings every week, and we see a lot of them come back through our shop. Here is what is actually different.
- The part number proves nothing on its own. Counterfeit injectors and pumps are stamped with the same OE numbers as the real thing, in housings cast to look identical. The number in the listing title tells you what the seller claims it is, not what came off an OE line.
- “Remanufactured” is not a regulated word. A genuine reman unit is stripped to bare components, has its wear parts replaced (nozzle, plunger and barrel, solenoid, seals) and is then run on a calibration bench until it meets the original flow and response spec. A cheap one is very often cleaned, resealed, painted and shipped. Both get called remanufactured.
- No full teardown, so no idea what is worn. A proper rebuild means the unit comes apart completely and every part gets inspected and measured against spec, not just the ones that are obviously bad. Skip the teardown and you are reusing worn internals inside a freshly painted housing. It will run on the truck. It will not last.
- No factory-spec bench load testing. A unit is not finished until it has been run under load on a test bench and made its numbers across the range, not just at one easy point. That bench time is most of what you are paying for. Sellers working on price cut it first, because nobody can see it in a photo.
- The warranty has to be honored by someone. Everything we remanufacture in house carries a one-year warranty, with 30 days on electrical components. Parts we supply as an authorized dealer carry the manufacturer’s own warranty. Either way you call us, a real shop in California, and we sort it out. A marketplace warranty usually means shipping the part overseas at your own cost and hoping for a reply.
- No core program. We credit your rebuildable core back in full. Discount sellers generally will not take one, so the gap narrows the moment you account for the core you are now stuck holding.
- A failed turbo can damage the engine. When a bargain turbo lets go it can put oil and debris straight into the intake. What starts as a turbo you saved a few hundred on can turn into an engine repair. Balance and clearance data are not optional on a rotating assembly spinning past 100,000 rpm.
We are an authorized Alliant Power dealer and a working fuel-injection shop. We have been rebuilding and testing this hardware in Woodland since 1993, and the people who answer the phone are the people who run the benches. Not sure this is the right part for your engine? Call us with your serial number before you order and we will confirm it. Send your rebuildable core back and the core charge is refunded. And if a price somewhere else looks too good, call 530-668-0818 and we will tell you straight whether it is a deal or a problem.
Why Buy From Valley Fuel Injection
We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who run our test benches. Not sure which version your engine takes? Call us with your engine serial number before you order and we will confirm it. That check is free and takes a couple of minutes.
Our turbocharger service also rebuilds and bench-tests Holset VGT actuators.
UPS to all 50 states, including Alaska and Hawaii. Your rate shows at checkout. A refundable core deposit is added at checkout and refunded in full when we receive your rebuildable core. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax and the refundable core charge are additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.













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