Will the PowerMax GT3788VA Turbo fit a 2004 truck?

No. Garrett gives the 2003 F-Series and Excursion with the 6.0L Power Stroke their own part number, 777469-5002S. Trucks from 2004 to 2007 take the PowerMax GT3788VA Turbo under part 772441-5002S. The two share published wheel sizes and ratings, so choose purely by model year.

How much power will it support?

Garrett estimates 560 horsepower, calculated strictly from the choke flow of the compressor map and representing potential flywheel horsepower. That is the turbo capability. A 6.0L reaches what its injectors, fuel system and calibration allow, and Garrett states that results depend heavily on these.

What does the variable nozzle do?

Nine movable vanes change how exhaust reaches the turbine wheel, so the turbo can act small at low engine speed and large at high speed. Garrett credits the design with a significant rise in turbine efficiency and stronger response from idle launch through peak torque on the 6.0L.

Why a bigger compressor wheel?

Garrett states that the larger compressor wheel increases the maximum power range while keeping turbo speeds down for the same power output. In practice the turbo does the same work at lower shaft speed than the stock unit, which leaves more margin when the truck is tuned or loaded.

Is it a direct replacement?

Yes. Garrett describes the GT3788VA as outline interchangeable with the factory turbo for a correct fit every time, and it can serve as a replacement or as an upgrade. The 2003 trucks use this specific part number, so confirm the model year before ordering.

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Description

Garrett PowerMax GT3788VA Turbo for 2003 Ford F-Series and Excursion 6.0L Power Stroke

Garrett’s PowerMax GT3788VA Turbo for the 2003 Ford F-Series and Excursion 6.0L Power Stroke is the early-year version of Garrett’s 6.0L upgrade, with its own part number for 2003 trucks. It uses Garrett’s patented Advanced Variable Nozzle Turbine, a compressor wheel larger than stock and a choke-flow rating of 560 horsepower. The larger wheel raises the maximum power range while keeping turbo speeds down at a given output, which suits a 6.0L that is being tuned or worked hard. Owners of 2004 and later trucks need the 2004-2007 part instead.

How AVNT Works

Nine movable vanes in the turbine housing change the effective nozzle area, which Garrett says significantly increases turbine efficiency and improves engine performance from idle launch through peak torque. The vanes are moved by Garrett’s patented integral electro-hydraulic actuation with a proportional solenoid, for infinitely variable control. The turbo is outline interchangeable with the original.

Features

Patented Advanced Variable Nozzle Turbine with nine movable vanes
Integral electro-hydraulic actuation and proportional solenoid for infinitely variable vane control
Larger compressor wheel than stock, extending the power range at lower turbo speed
Outline interchangeable with the factory turbocharger

Specifications

Garrett turbo model: GT3788VA
Compressor inducer and exducer: 64mm and 88mm
Compressor trim and A/R: 52 trim, 0.58 A/R
Turbine inducer and exducer: 73mm and 66mm
Turbine trim and A/R: 84 trim, 0.90 A/R
Garrett power rating: 560 horsepower

Applications

Garrett lists the PowerMax GT3788VA Turbo for these 2003 vehicles:

Ford Excursion: 2003 | 6.0L Power Stroke
Ford F-Series: 2003 | 6.0L Power Stroke

Notes

For 2004-2007 trucks, choose the 2004-2007 6.0L PowerMax turbo
The 560 horsepower figure is an estimate from the choke flow of the compressor map; results depend on modifications and calibration
Garrett publishes speed sensor kit instructions for the 6.0L turbo; see Garrett speed sensor kits

Frequently Asked Questions

Will the PowerMax GT3788VA Turbo fit a 2004 truck? No. Garrett gives the 2003 F-Series and Excursion with the 6.0L Power Stroke their own part number, 777469-5002S. Trucks from 2004 to 2007 take the PowerMax GT3788VA Turbo under part 772441-5002S. The two share published wheel sizes and ratings, so choose purely by model year.
How much power will it support? Garrett estimates 560 horsepower, calculated strictly from the choke flow of the compressor map and representing potential flywheel horsepower. That is the turbo capability. A 6.0L reaches what its injectors, fuel system and calibration allow, and Garrett states that results depend heavily on these.
What does the variable nozzle do? Nine movable vanes change how exhaust reaches the turbine wheel, so the turbo can act small at low engine speed and large at high speed. Garrett credits the design with a significant rise in turbine efficiency and stronger response from idle launch through peak torque on the 6.0L.
Why a bigger compressor wheel? Garrett states that the larger compressor wheel increases the maximum power range while keeping turbo speeds down for the same power output. In practice the turbo does the same work at lower shaft speed than the stock unit, which leaves more margin when the truck is tuned or loaded.
Is it a direct replacement? Yes. Garrett describes the GT3788VA as outline interchangeable with the factory turbo for a correct fit every time, and it can serve as a replacement or as an upgrade. The 2003 trucks use this specific part number, so confirm the model year before ordering.

About Garrett

Garrett Motion has turbocharged engines since 1955, when its T15 was matched to the Caterpillar D9 crawler, and in 1962 a Garrett turbocharger went into the Oldsmobile Jetfire Turbo Rocket, the first turbocharged production car. Garrett has supplied turbocharging in Formula 1 with Scuderia Ferrari, the FIA World Rally Championship and the 24 Hours of Le Mans. It has operated as a stand-alone company since 2018, and its technology is fitted to around 150 million vehicles worldwide.

Additional Information

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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Garrett PowerMax GT3788VA Turbo for 2003 Ford F-Series and Excursion 6.0L Power Stroke [777469-5002S]

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Garrett PowerMax GT3788VA Turbo for 2003 Ford F-Series and Excursion 6.0L Power Stroke

How AVNT Works

Features

Specifications

Applications

Notes

Frequently Asked Questions

About Garrett

Reviews