Ball Bearing Turbo – Garrett GT4294R/GT4202R (aka GT42R / GT42RS) w/ Turbo Unit and Housing Options

The Garrett GT4294R and GT4202R dual ball bearing turbochargers are built for serious horsepower goals on high-output builds where response and top-end capability both matter. Whether you’re targeting the 850hp range or pushing toward 1,000hp, this platform gives enthusiasts and racers a proven big-frame turbo backed by a wide range of housing configurations to match your specific manifold and exhaust setup. Choose this unit when you need a turbocharger engineered to handle serious power without compromise.

Specifications

• Compressor Wheel (GT4294R): 94mm w/ 56 trim (70.3mm inducer)
• Compressor Wheel (GT4202R): 102mm w/ 53 trim (74.7mm inducer)
• Compressor Housing A/R: .60 A/R
• Turbine Wheel: 82mm w/ 84 trim (75.1mm exducer)
• Bearing Type: Dual Ball Bearing
• HP Capacity (GT4294R): 850hp
• HP Capacity (GT4202R): 1,000hp
• Turbine Housing Options: T4 Divided, 4″ V-band, 1.01 A/R
• Turbine Housing Options: T4 Divided, 4″ V-band, 1.15 A/R
• Turbine Housing Options: T4 Divided, 4″ V-band, 1.28 A/R
• Turbine Housing Options: T4 Divided, 4″ V-band, 1.44 A/R
• Turbine Housing Options: T6 Divided, 5″ V-band, 1.15 A/R
• Turbine Housing Options: T4 Undivided, 4″ V-band, 1.44 A/R
• Turbine Housing Options: V-Band inlet & outlet, 1.15 A/R
• Turbine Housing Options: V-Band inlet & outlet, 1.28 A/R
• Turbine Housing Options: V-Band inlet & outlet, 1.44 A/R
• Turbine Housing Options: TiAL V-band inlet & outlet, 1.02 A/R
• Turbine Housing Options: TiAL V-band inlet & outlet, 1.16 A/R
• Turbine Housing Options: TiAL V-band inlet & outlet, 1.30 A/R
• Optional Upgrade: Polished Compressor Housing
• Also Known As: GT42R (GT4294R) / GT42RS (GT4202R)

Performance & Application

The GT4294R (GT42R) delivers up to 850hp, making it a strong choice for high-horsepower street and race builds that still want a manageable powerband. The GT4202R (GT42RS) steps up to 1,000hp capability, suited for dedicated high-boost applications where maximum top-end output is the priority. Both units share the same .60 A/R compressor housing and 82mm turbine wheel, differing in compressor wheel sizing to tune the balance between response and peak flow. With multiple turbine housing configurations available — including T4 divided, T4 undivided, T6 divided, and V-band options across a range of A/R ratios — builders can dial in spool characteristics to match their exhaust manifold and power targets.

Frequently Asked Questions

What HP can the GT4294R (GT42R) support?

The GT4294R is capable of 850hp.

What HP can the GT4202R (GT42RS) support?

The GT4202R is capable of 1,000hp.

Is this a ball bearing or journal bearing turbo?

This is a Garrett dual ball bearing turbocharger.

What does GT42R / GT42RS refer to?

GT42R is the alias for the GT4294R, and GT42RS is the alias for the GT4202R.

For builders who demand proven, high-horsepower capability with the flexibility to match housing configuration to their exact setup, the GT4294R/GT4202R platform delivers the performance and versatility serious builds require.