Ball Bearing Garrett GT4718R (aka GT4788-R)

The Garrett GT4718R is a large-frame ball bearing turbocharger built for serious high-horsepower applications where response and top-end capability both matter. Designed for enthusiasts and builders chasing massive power numbers without sacrificing the benefits of ball bearing technology, this unit is engineered to handle extreme boost demands reliably. It’s the choice for builds that need a turbo capable of supporting some of the highest horsepower targets in the performance aftermarket.

Specifications

• Compressor Wheel Diameter: 118mm exducer / 88mm inducer
• Compressor Wheel Trim: 56 trim
• Compressor Housing A/R: 0.69
• Compressor Inlet: 6″ inlet
• Compressor Outlet: 3.5″ outlet, slip-on connection
• Turbine Wheel Diameter: 92.7mm
• Turbine Wheel Trim: 82 trim
• Turbine Housing A/R Options: .96, 1.08, 1.23, 1.39
• Turbine Housing Inlet: T6 undivided inlet
• Turbine Housing Outlet: 5″ V-band outlet
• Bearing Type: Ball Bearing
• HP Capacity: Capable of close to 1400HP
• Garrett P/N: 775839-5002S
• Alternate P/N: 769210-0002
• Also Known As: GT4788-R

Performance & Application

The GT4718R is built for high-horsepower performance builds demanding both durability and massive top-end airflow. Its ball bearing architecture supports quicker spool response compared to traditional journal bearing designs of similar size, while the large compressor and turbine wheel combination is engineered to sustain extreme power output. With multiple turbine housing A/R options available, builders can tailor the turbo’s characteristics toward either quicker spool or maximum top-end flow depending on the application. This is a turbo suited for extreme street, race, and high-boost performance platforms pushing toward the top of the horsepower spectrum.

Frequently Asked Questions

What HP can the GT4718R support?

The GT4718R is capable of close to 1400HP.

Is the GT4718R a ball bearing or journal bearing turbo?

The GT4718R is a ball bearing turbocharger.

What compressor inlet and turbine flange does the GT4718R use?

The compressor housing has a 6″ inlet with a 3.5″ slip-on outlet, while the turbine housing uses a T6 undivided inlet with a 5″ V-band outlet.

What does GT4788-R refer to?

GT4788-R is an alternate name for the Garrett GT4718R.

For builders targeting elite horsepower levels with the reliability and response of ball bearing technology, the Garrett GT4718R delivers a proven platform ready for the most demanding performance builds.