The Garrett G42-1200 turbo assembly kit with a T4 divided 1.15 A/R turbine housing is built for serious high-horsepower applications where response and top-end capability both matter. Riding on a ball-bearing core, this assembly is engineered for enthusiasts and builders who demand a turbocharger capable of supporting massive power without sacrificing drivability. This is the choice for those building a no-compromise, high-output performance platform.

Specifications

• Compressor Wheel Inducer: 73mm
• Compressor Wheel Exducer: 91mm
• Compressor Wheel Trim: 65
• Compressor Housing A/R: 0.85
• Turbine Wheel Inducer: 82mm
• Turbine Wheel Exducer: 75mm
• Turbine Wheel Trim: 84
• Turbine Housing: T4 Divided, 1.15 A/R
• Bearing Type: Ball Bearing
• HP Capacity: 1200HP
• Garrett P/N: 879779-5011S

Performance & Application

The G42-1200 is designed for builds targeting extreme horsepower levels while maintaining strong throttle response thanks to its ball-bearing core. The T4 divided turbine housing with 1.15 A/R supports pulse-separated exhaust energy for improved spool characteristics relative to a comparable non-divided housing, while still enabling the turbo to reach its full 1200HP capability. This assembly suits high-boost, high-output performance builds where both response and top-end power are priorities. It is well suited to enthusiasts pushing well beyond stock power levels who need a single turbo solution capable of supporting four-digit horsepower figures.

Frequently Asked Questions

What HP can the G42-1200 support?

The Garrett G42-1200 turbo assembly is capable of supporting up to 1200HP.

Is the G42-1200 a ball bearing or journal bearing turbo?

The G42-1200 assembly kit runs on a ball-bearing core.

What turbine housing configuration does the G42-1200 use?

It uses a T4 divided turbine housing with a 1.15 A/R ratio.

What is the compressor housing A/R on the G42-1200?

The compressor housing A/R is 0.85.

For builders targeting the 1200HP mark without giving up response, the Garrett G42-1200 with its T4 divided 1.15 A/R housing and ball-bearing core delivers the performance ceiling and durability this class of build demands.