Genuine Holset Cummins ISB 6.7 Turbo | HE300VG - 3786778H

Genuine Holset 3786778H Turbocharger with VGT Actuator – Cummins ISB 6.7L

Upgrade your Cummins ISB 6.7L with the Genuine OEM Holset 3786778H Turbocharger, engineered for maximum durability, efficiency, and performance. This factory-equipped Variable Geometry Turbo (VGT) features an integrated electronic actuator designed to deliver instant throttle response, improved torque, and optimized fuel economy in demanding commercial truck applications.

Built to exacting OEM standards, the 3786778H turbo is a direct-fit replacement for your original unit—no modifications required. Trusted by fleets and owner-operators alike, Holset VGT technology ensures precise boost control, reduced turbo lag, and long service life, making it ideal for medium-duty Cummins 6.7L diesel engines used in vocational trucks, delivery vehicles, and buses.

✅ Key Features:

• Genuine OEM Holset Turbocharger — Part Number 3786778H
• Designed for Cummins ISB 6.7L commercial diesel engines
• Integrated electronic VGT actuator for optimized boost control
• Improves torque, throttle response, and efficiency
• 100% new unit — No core required
• Backed by Holset quality and reliability

Cross Reference / OEM Numbers:

• 433521	3771659	4955397	378677800H
  2834847	3786105	4955398	3786778H
  2834989	3786778	4955543	3799852H
  2837246	3791764	5322099	4955397NX
  2837247	3791772	5325892	4955397RX
  2837259	3791787	5325908	4955398NX
  2839136	3791788	5325909	4955398RX
  2839138	3791864	378677800	4955543NX
  2839148	3799852	532209900	4955543RX
  2839149	4043425	1700321093	532209900H
  2839156	4043429	1700322651	532209900HX
  3060231	4043430	1700322652	5322099HX
  3771645	4044384	1700322966	5322099NX
  3771646	4044385	170-032-2651	5322099RX
  3771649	4044394	170-032-2652	TS2839136
  3771658	4047280	170-032-2966	TS2839136R

⚙️ Common Applications:

• Cummins ISB 6.7L Diesel Engines
• Medium-Duty Commercial Trucks
• Vocational Vehicles, Buses, and Fleet Applications

? Why Choose a Genuine Holset Turbo:

Holset is the OEM turbocharger manufacturer for Cummins, ensuring unmatched fitment, performance, and longevity. Unlike generic aftermarket options, this turbo is built to handle the high heat, pressure, and duty cycles of real-world commercial trucking.