The Garrett G42-1200C is a compact-housing turbo assembly built for enthusiasts and racers who demand serious top-end power without sacrificing the ability to package the turbo in tight engine bays. Engineered around Garrett’s proven G Series compressor and turbine architecture, this kit pairs a high-flow compressor wheel with a T4 divided turbine housing for builds that need to make big numbers reliably. It’s the right choice for anyone stepping up from a stock or entry-level turbo into a serious, high-output platform.

Specifications

• Compressor Wheel Inducer: 73mm
• Compressor Wheel Exducer: 91mm
• Compressor Wheel Trim: 65
• Compressor Housing A/R: 0.90
• Compressor Inlet/Outlet: 4″ inlet and 3″ outlet hose connections
• Turbine Wheel Inducer: 82mm
• Turbine Wheel Exducer: 75mm
• Turbine Wheel Trim: 84
• Turbine Housing: 1.15 A/R T4 Divided
• Housing Style: Compact CHS
• Bearing Type: Ball bearing construction
• HP Capacity: 1200HP
• Garrett P/N: 879779-5005S

Performance & Application

The G42-1200C is built for high-horsepower applications where a T4 divided turbine housing is required for optimal exhaust pulse separation and turbine efficiency. Its ball bearing construction supports quick spool characteristics while the compact CHS housing design simplifies packaging in space-constrained engine bays. With a 1200HP capacity, this turbo is suited to serious performance builds that need to push well beyond stock power levels while maintaining strong response. The 0.90 compressor A/R and 1.15 T4 divided turbine A/R combination is tuned for builds prioritizing both response and sustained high-output capability.

Frequently Asked Questions

What HP can the G42-1200C support?

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

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

The G42-1200C features ball bearing construction.

What turbine housing configuration does the G42-1200C use?

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

What compressor inlet and outlet connections does the G42-1200C use?

The compressor housing features a 4″ inlet and 3″ outlet hose connections, with a 0.90 A/R.

For builds targeting up to 1200HP with the response benefits of a T4 divided housing and the packaging advantages of a compact compressor housing, the Garrett G42-1200C delivers a proven, purpose-built solution.