
The HX55 (2836376) is a Holset turbocharger for the Detroit DD15 14.8L engine in Freightliner Cascadia trucks. While most DD15 engines run BorgWarner B3G turbos, certain DD15 configurations were fitted with this Holset HX55 — the Mercedes A4720960799 number on the nameplate identifies it. Fixed-geometry design, simpler than the VGT B3G units. Holset 2836376/2836378, with cross-references 4049886 and 4049887. Built new, dynamically balanced, ships with gaskets. We supply shops, fleets, and distributors.
HX55 (Holset, fixed geometry)
2836376, 2836378, A4720960799, 4049886, 4049887
Detroit DD15 14.8L (Freightliner Cascadia)
The HX55 (2836376 / 2836378 / A4720960799) fits specific Detroit DD15 14.8L configurations in Freightliner Cascadia trucks.
Check the nameplate on your old turbo. Holset 2836376/2836378 or Mercedes A4720960799 = this HX55. Other A472 numbers = one of the B3G configurations.
Brand new, dynamically balanced. No core charge. One-year unlimited-mileage warranty.
Yes. US stock, volume pricing for shops, fleets, and distributors.
The DD15 turbo family is mostly BorgWarner B3G, but this Holset HX55 covers specific DD15 builds. If your old turbo nameplate reads Holset 2836376/2836378 or Mercedes A4720960799, this is your unit. If it reads a different A472 number, see our B3G listings instead.
| Turbo | Key number | Years |
|---|---|---|
| HX55 Holset (this page) | 2836376 / A4720960799 | Specific configs |
| B3G | A4720901480 | 2015-2018 |
| B3G | A4720901880 | 2018+ |
| B3G | 4720902780 | 2018+ |
See our quality process for details.