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Riffraff Diesel Performance Inc, Engines - Supplies, Equipment & Parts, Eagle Point, OR


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Garrett PowerMax GT3788VA Stage 1 Turbo 04-07

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$1,175.95 (You save $570.12)
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Garrett PowerMax GT3788VA Stage 1 Turbo 6.0L Power Stroke engine (04-07)

  • Features the Garrett® patented Advanced Variable Nozzle Turbine (AVNTTM) design for increased compressor flow and boost response
  • Utilizes nine movable vanes which significantly increase turbine efficiency and improve engine performance from idle launch through peak torque
  • Patented integral electro-hydraulic actuation and proportional solenoid for infinitely variable control
  • Larger compressor wheel over stock increases maximum power range while keeping turbo speeds down for the same power output
  • Supports up to an additional 175 HP over stock with no sacrifice in drivability
  • Suitable as a performance upgrade or replacement for original equipment
  • Outline interchangeable for a perfect fit each and every time


Model years 2003 (PN 777469-5001s) built 9/29/03 and before, 2004-2007 (PN 772441-5002s) 6.0L Power Stroke engine

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Product Reviews

Showing reviews 1-10 of 39 | Next

  1. The best upgrade on any 6.0 Ford Turbo 5 Star Review

    Posted by on Jul 30th 2018

    Great hp&tq gains with a tuner bar none!

  2. Lag 3 Star Review

    Posted by on Jun 19th 2018

    Love the sound, but hate the lag. Seems to give better hp @ tq. But the lag in spooling up is the reason for the average review. A tune or a more open exhaust would probably give me what I expected but not able to justify the added experience.

  3. Great turbo and price 5 Star Review

    Posted by on May 29th 2018

    Nice performance upgrade that bolts in like a stock turbo, cant beat the price!

  4. GT3788VA stage 1 5 Star Review

    Posted by on May 22nd 2018

    Riffraff is the only way to go

  5. Garrett PowerMax GT3788VA Stage 1 Turbo 04-07 5 Star Review

    Posted by on Mar 28th 2018

    Easy install, sounds great even with stock exhaust- I cant wait to get my 4" full flowing exhaust on this week!

  6. Bad ass 5 Star Review

    Posted by on Mar 1st 2018

    Great powerful product, got the sound and power I was looking for, great product... thanks fellas

  7. great product 5 Star Review

    Posted by on Dec 1st 2017

    great product quick shipping

  8. Powermax Turbo 5 Star Review

    Posted by on Nov 20th 2017

    Awesome product extremely more fun than stock and went in as easy,lined up perfectly. Best price I could find anywhere! Only thing I didn't like is the box was really banged up and a big heavy expensive turbo needs better care when shipped!

  9. Awesome product and Excellent CUSTOMER Service 5 Star Review

    Posted by on Oct 31st 2017

    The product is great and the price is the best out there. The customer service from RiffRaff is excellent, I called left message and in a very timely manner returned my call. The call was quick and efficient and I was very happy.

  10. Replaced stock turbo with Garret Powermax 4 Star Review

    Posted by on Jul 6th 2017

    Shipping was very fast and price was unbeatable. I got tired removing my stock turbo and cleaning it every 2 years to clear codes so I replaced it. This turbo whistles non stop and gets people looking. I lost about 8 psi of max boost, but it makes boost lower and faster, 20-21 psi max. Combined with my tune and bolt ons, this truck pulls hard.

Showing reviews 1-10 of 39 | Next