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Denso 295050-0421 is the Denso type electronic common rail injector with a top two stud terminal, a black T shaped body with a threaded side high pressure inlet, a blue O ring and a slim nozzle. It is used on Caterpillar C4.4 and Perkins engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as Caterpillar 370-7287 and Perkins T409983.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Common Rail Fuel Injector |
| Replaces | Denso 295050-0421 |
| Injector type | Electronic common rail |
| Engine | Caterpillar C4.4, Perkins |
| Cross references | Caterpillar 370-7287, Perkins T409983 |
| Fits | the Caterpillar C4.4 and matching Perkins diesel engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 840999 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Denso Part No.(SPM Part No.) | Fits |
|---|---|
| 295050-0421 / Caterpillar 370-7287 / Perkins T409983(SPM-HEP-4862) | the Caterpillar C4.4 and matching Perkins diesel engines |
| Brand | Part No. |
|---|---|
| Denso | 295050-0421 (this page, SPM-HEP-4862) |
| Caterpillar | 370-7287 |
| Perkins | T409983 |
All of these numbers are the same part.
What it does
A common rail injector opens electrically several times per combustion stroke, spraying fuel at very high pressure. Its timing and flow are set by the engine controller using the trim code on its body.
Where it is used
Made for the Caterpillar C4.4 and matching Perkins diesel engines.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (6 aftermarket sellers) | USD 100.00 to 103.65 | 1 Nov 2026 |
| SINOCMP | USD 179.00 | 1 Nov 2026 |
| Spare Part Mart | USD 84.60 | Today |
Our price of USD 84.60 is 15% to 53% 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 Denso 295050-0421 with the same fitting.
Often 5,000 to 10,000 hours, but much less on poor or wet fuel. Injectors are usually changed when they fail a test, not by hours.
Black or white smoke, a misfire or knock on one cylinder, hard starting, higher fuel use, or a high return leak or balance rate on test.
Not always. If the others pass a return leak or balance test, one can be changed. Where they are all high hours, a full set keeps the cylinders even.
Always. Fit a new copper washer and O-rings under every injector you remove. A reused washer leaks combustion gas and carbon packs the bore.
No. It is an aftermarket fuel injector made to replace the Denso 295050-0421. 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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