Ball Bearing Garrett GT4708R (aka GT4780-R)

The Garrett GT4708R is a ball bearing large-frame turbocharger built for enthusiasts chasing serious top-end power without sacrificing the response that ball bearing technology delivers. Engineered for extreme boost applications, this unit is the choice for builders targeting big horsepower numbers on a platform that can handle the airflow. Whether you’re building a dedicated race engine or a high-horsepower street/strip combination, the GT4708R is designed to deliver.

Specifications

• Bearing Type: Ball Bearing
• Compressor Wheel Diameter: 108mm exducer / 80.8mm inducer
• Compressor Wheel Trim: 56 trim
• Compressor Housing A/R: 0.69 A/R
• Compressor Inlet: 6″ inlet
• Compressor Outlet: 3.5″ outlet, slip-on connection
• Turbine Wheel Diameter: 92.7mm
• Turbine Wheel Trim: 82 trim
• Turbine Housing Inlet: T6 undivided inlet
• Turbine Housing Outlet: 5″ V-band outlet
• Available Turbine Housing A/R Options: 0.96, 1.08, 1.23, 1.39
• HP Capacity: Capable of close to 1200HP
• Garrett P/N: 775839-5001S
• Also Known As: GT4780-R
• Alternate P/N: 769210-0001

Performance & Application

The GT4708R is built for extreme boost applications where high-horsepower capacity is the priority. Its ball bearing design supports the kind of massive airflow needed for near four-figure horsepower builds while still offering the responsiveness ball bearing turbos are known for. The multiple turbine housing A/R options allow builders to tune the balance between spool characteristics and top-end flow to match their specific power goals. This is a large-frame turbo intended for serious, high-output performance builds rather than mild street applications.

Frequently Asked Questions

What HP can the GT4708R support?

The GT4708R is capable of close to 1200HP.

Is the GT4708R a ball bearing or journal bearing turbo?

The GT4708R is a ball bearing turbocharger.

What turbine housing A/R options are available for the GT4708R?

Turbine housing A/R options of 0.96, 1.08, 1.23, and 1.39 are available for this unit.

What does GT4780-R refer to?

GT4780-R is an alternate name for the Garrett GT4708R.

For builders chasing near-1200HP with the response and durability of Garrett’s ball bearing platform, the GT4708R delivers the flow capacity and turbine housing flexibility to match the demands of extreme performance builds.