Garrett 773540-5001S PowerMax GT3794VA Stage 1 AVNT Turbocharger

2004.5-2010 GM 6.6L Duramax (500HP)
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The Garrett 773540-5001S PowerMax GT3794VA Stage 1 Turbocharger is a must have for any 04.5-10 GM 6.6L Duramax LLY/LBZ/LMM Duramax owner that’s looking to get more out of their truck. Featuring the Garrett patented Advanced Variable Nozzle Turbine (AVNT) design for increased compressor flow and boost response. The GT3794VA also utilizes nine movable vanes which significantly increase turbine efficiency and improves engine performance from idle launch through peak torque.

Designed as a “drop-in upgrade”, the
GT3794VA retains use of factory components such as engine electronics, mounting pedestal and requires no additional modifications to your factory exhaust system. Utilizing a larger compressor wheel the GT3794VA turbocharger will increase your maximum power range while supporting up to 500HP with no sacrifice to drivability.

While this turbocharger is suitable as a replacement for factory equipment, it’s recommended that additional fueling upgrades such as aftermarket/custom tuning are installed or already in use. Includes turbocharger, adapter cable and installation instructions. 

Note: Gaskets not included.

  • Retains Factory Electronics
  • “Drop-In Replacement”
  • Supports Up To 500HP

Note from Garrett regarding shaft play:

When the Powermax turbo is new, or has not operated for a long period of time allowing most of the oil to drain out, the rotating assembly will move more in the radial direction because there is no oil in the center housing. This condition is normal. As long as the shaft wheel spins freely and the wheels don't contact their respective housings, the assembly will function properly.

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(191 Ratings, 3 Reviews) Average Rating:
great turbo for the buck
joshua charlton (long beach, ca ) 9/25/2015 1:33 PM
this turbo is way under rated i was able to get 700hp at the motor with the turbo. drive ability is almost like factory a little laggy but its also much larger then the factory i would buy this again. and it also has that whistle that everyone wants too
great turbo
chris (Illinois ) 3/8/2015 12:22 PM
My fuel economy went up 2 Mikes per gallon with just turbo then added ppe econo tune and got 2-3 more mpg. The turbo whistle is great as well. I would recommend this turbo to anyone who is looking for the next step in turbos.
shop owner
luke (germantown ohio) 2/21/2012 3:27 PM
I Installed This Charger On a customers truck who wanted the whistle this charger for sure does that it will whistle like a fleece charger but is cheaper. if your looking for a little better responce and that amazing whistle this is the charger for you. would reccomend it to any street truck