• Cart

SKU #: GAR-886976-5004S MPN #: 886976-5004S

Garrett GT3788V PowerMax Stage 1 Turbo 11-16 GM Duramax LML

$3,118.53
Get 3118 points in loyalty rewards
Description
If you're looking for a little more power out of your LML Duramax, this drop in replacement Garrett PowerMax turbo will give you that, and more. Designed to support up to 600 RWHP, the Stage One PowerMax features a patented design for increased compressor and turbine flow in order to keep drive pressures, as well as EGT's (Exhaust Gas Temperatures) at a minimum. This turbo is a great compliment for those running a moderate to extreme programmer that use their trucks for daily driving or towing. Due to its ball bearing cartridge, journal bearing cartridge failures are a thing of the past, as well as will provide enhanced bottom end response compared to the factory unit, all while being able to handle higher boost pressures.

Enter your zip and we'll see if installation is available.

  • Request quotes from local installers at checkout
  • Compare options and choose the best fit for your install

If you're looking for a little more power out of your LML Duramax, this drop in replacement Garrett PowerMax turbo will give you that, and more.

Designed to support up to 600 RWHP, the Stage One PowerMax features a patented design for increased compressor and turbine flow in order to keep drive pressures, as well as EGT's (Exhaust Gas Temperatures) at a minimum. This turbo is a great compliment for those running a moderate to extreme programmer that use their trucks for daily driving or towing. Due to its ball bearing cartridge, journal bearing cartridge failures are a thing of the past, as well as will provide enhanced bottom end response compared to the factory unit, all while being able to handle higher boost pressures.

NOT LEGAL FOR SALE OR USE IN CALIFORNIA
Vehicle Fitment
2011-2016 6.6L GM Duramax LML
WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov
FEATURES & BENEFITS:
  • 65mm Inducer
  • Supports Up To 600HP
  • 19% More Air Flow Than Stock
About Garrett
Garrett Turbochargers are OEM equipment on many cars and trucks. The also have an aftermarket diesel performance turbo line marketed as POWERMAX Performance Diesel. At Diesel Power Products we carry a variety of Garrett stock turbo parts as well as a few of their more popular performance models. The GTP38R ball bearing turbo that Garrett produces specifically for the 99-03 7.3L Ford Powerstrokes is by far the most popular turbo we sell. It features a 4" intake along with a custom silicone adapter hose, a ported shroud intake housing which helps control surging, a 1.0 A/R exhaust housing to help keep EGT's down, a large 88mm compressor wheel to manage all that airflow and, of course, a ball bearing cartridge. The ball bearing aspect is what really sets it apart. No journal bearing turbo can touch it when it comes to spool-up or reliability. The GTP38R functions best in Powerstrokes making up to around 475HP. You can stretch it a little further by substituting a 1.15 A/R exhaust housing for the 1.0. The 1.15 is non-wastegated and requires a machined adapter, which we also carry. You can even order the turbo in this configuration if you prefer.

If you prefer to stay with the stock turbo we carry a full line of Garrett stock replacements for the Ford Powerstrokes. We can also make a variety of modifications to the stock turbo to make it suit you needs. These mods include: ATS ported shroud, wastegated or non-wastegated 1.0 A/R or 1.15 A/R exhaust housings, wicked wheel, upgraded BD Power wastegates to control creep, non EBV pedestals and more. Give us a call or send us an email, we'll be happy to help you figure out which turbo combination is right for your application.

Overall rating: 3.0 / 5 from 4 reviews.

AI Generated Review Summary

Summary topics

Review topics: [].

Review highlights

Reviews

Nice slightly overstock turbo from

"Nice slightly overstock turbo from garret !"

Todd P. (4/5)

Is actually a downgrade for daily drivers

"We own a 2011 LML, and "upgraded" to this turbo during a rebuild. Truck is deleted, with EFI live tunes, and we occasionally haul a 4000lb camper. Long story short, this turbo is slow to provide power, unless just MASH the pedal. The truck's responsiveness seems sluggish overall except in gears 1-3. . . Once it shifts into 4th, there's a huge drop-off. We've spoken with tuners in TN, AZ, and WY. . . They all hate these turbos, and say they're difficult to tune for. Wish I knew then, what a know now. Unless you like turbo lag, stay away. (Purchased from another site, that doesn't allow reviews for products, only the store."

David G. (2/5)

IT WORKS

"I had this turbo installed as an upgrade, while having my LML rebuilt due to a blown head gasket. About all I can say is that it's working properly. . . The truck runs strong, with good response. The "turbo whistle" isn't much different than stock, but I don't have any upgraded pipes or intakes either. Mostly I have the piece of mind of that extra airflow/boost when i'm hauling my camper uphill."

Dave G. (4/5)

No difference in performance

"My mechanic recommended this to me, and I definitely wish I wouldn't have listened. I can't tell difference in power nor sound than my stock Garrett."

D. D. (2/5)

Q&A