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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

  • Garrett PowerMax GT3788VA Stage 1 Turbo 6.0L
Your Price:
$1,039.52 (You save $129.00)
Part Number:

 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

*Picture is provided by Garrett/ Compressor housing isn't polished as shown.

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Product Reviews

Showing reviews 1-10 of 30 | Next

  1. 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.

  2. 04 powerstroke 4 Star Review

    Posted by on Jul 2nd 2017

    This turbo seems a lot better than the stock one milage is good.Cheaper than Amazon.

  3. Didn't know what I was missing! 5 Star Review

    Posted by on May 25th 2017

    Bought a 2005 F250 and figured there would be some repairs..But when I needed a turbo I searched and found this at RiffRaff. Price was great but their ability to overnight it to me AND answer questions about the install was beyond what I expected! I'm not only a customer for life, I'm and FAN! Thanks to Clay and the whole team at RiffRaff!

  4. Excursion 6.0 5 Star Review

    Posted by on May 16th 2017

    I'm happy with this purchase it arrives fast and it works awesome very happy with the whistle

  5. Best purchase ever! 5 Star Review

    Posted by on Apr 18th 2017

    I'm in love with my powermax turbo! Thank you very much for your honesty. This was shipped less then an hr after I ordered it. Was on my doorstep 2 days later in MN. I paid over $70 for shipping because I needed it quick & was still cheaper than all the places with free shipping! Thanks again & I look forward doing business with Riffraff again.

  6. Know what you're getting 5 Star Review

    Posted by on Mar 10th 2017

    This is as much a review for Riff Raff as it is the turbo. I needed a new turbo stat and looked all over the internet once I had decided on a Powermax for my 05. Not sure why I didn't run across Riff Raff sooner but I almost bought from some place back east. Luckily they didn't have it in stock and wanted a week before they could send me one. Riff Raff had one to me in 2 days for $150 less. Impressive. I'll be using these guys in the future. The turbo itself was as advertised. Pretty easy to install, make sure you have a gasket and o-ring set which is not included. There's a slight power increase which has been noticeable even at take-off. The whistle is markedly louder, but I've got a 4" turbo-muffler 5" muffler-back with 6" tip exhaust. Not sure how different it would sound with stock exhaust. So far the best improvement is EGT's. +-100° decrease in EGt's under heavy load. Turbo boost pressure has also increased. I've got a max of 30psi on my Edge W/attitude programmer readout, a 3psi increase. This thing moves some air especially over stock. If you're wanting or needing to get a new turbo, but don't want to break the bank, get this turbo. If you want a performance turbo upgrade but don't want to blow your 6.0 to bits, get this turbo. If you've got more money than sense, if you need to compensate for your non-existent manhood or if daddy foots the bill for your truck habit, shop elsewhere.

  7. Backyard mechanic 5 Star Review

    Posted by on Jan 3rd 2017

    Went in fairly easily seems to be running great so far Talk to customer service they were great I will definitely be buying again parts that I need for my diesel which I already have

  8. Best stock replacement upgrade turbo available!! 5 Star Review

    Posted by on Dec 26th 2016

    This turbo with the SCTx4 programmer is the best additions I've done to my 6.0 Powerstroke for power upgrades yet hands down!!

  9. Love the Whistle 5 Star Review

    Posted by on Nov 7th 2016

    Really woke the truck up. The stock turbo went out and after several conversations with Clay went with his recommendation on the PowerMax.

    Glad I did not go back with the stock turbo

    As always RiffRaff is the BEST PLACE to get Ford diesel stuff

  10. Great Turbo, unbelievable price 5 Star Review

    Posted by on Oct 7th 2016

    Love the way this turbo cleans up my tuned 05 and it was almost $200 cheaper than I could find anywhere else. I will be back for sure when I get injectors.

Showing reviews 1-10 of 30 | Next