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SPM-HEP-4594 is the HE221W turbocharger: a wastegated unit with the actuator and its boost hose, a single entry four bolt turbine inlet and an aluminium compressor housing with a V band outlet. It is used on Cummins QSB6.7 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
It replaces Cummins 4040572 and Cummins 4040573.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Turbocharger |
| Replaces | Cummins 4040572 |
| Turbo model | HE221W |
| Wastegate | Yes |
| Engine | Cummins QSB6.7 |
| Cross references | Cummins 4040573 |
| Fits | Cummins QSB6.7 engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 841480 |
| Country of Manufacture | China |
Cummins machines
Check the part number on your old unit before ordering.
| Cummins Part No.(SPM Part No.) | Fits |
|---|---|
| 4040572(SPM-HEP-4594) | Cummins QSB6.7 engines |
| 4040573(SPM-HEP-4594) | Cummins QSB6.7 engines |
What it does
Exhaust gas spins the turbine, which drives the compressor wheel on the same shaft and pushes more air into the engine. More air lets the engine burn more fuel cleanly, giving the rated power.
Where it is used
Made for the Cummins QSB6.7 engines.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (8 aftermarket sellers) | USD 256.84 to 385.20 | 31 Oct 2026 |
| FridayParts | USD 372.75 | 31 Oct 2026 |
| Fab Heavy Parts | USD 397.60 | 2 Nov 2026 |
| SINOCMP | USD 589.00 | 31 Oct 2026 |
| Spare Part Mart | USD 213.41 | Today |
Our price of USD 213.41 is 17% to 64% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it is a direct replacement for the Cummins 4040572 with the same fitting.
Often as long as the engine, 8,000 hours or more, when the oil and air filters are kept on schedule. Most turbos fail early from oil or dirt problems, not age.
Blue or black smoke, a whistle or siren noise, loss of power, oil in the intake or exhaust, or the shaft rubbing the housing.
Pour clean engine oil into the oil inlet and turn the shaft by hand, then crank the engine with the fuel cut until oil pressure shows. Let it idle for a minute before load.
Yes. Fit new oil and a new filter, and replace the oil feed and drain gaskets. Make sure the drain line is clear and runs downhill.
No. It is an aftermarket turbocharger made to replace the Cummins 4040572. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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