Turbo Assembly Kit, G42-1200, O/V V-Band / V-Band 1.01 A/R, Garrett P/N 879779-5007S

The Garrett G42-1200 Turbo Assembly represents the pinnacle of Garrett’s G Series lineup, engineered for builders chasing serious top-end power without sacrificing usable response. This turbo is built for high-horsepower applications where a v-band inlet and outlet turbine housing configuration is required for maximum flow efficiency and easier fabrication. If your build demands massive power potential in a compact, ball bearing package, this is the assembly to spec.

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 A/R: 1.01
• Turbine Housing Configuration: V-Band Inlet / V-Band Outlet
• Bearing Type: Ball Bearing
• HP Capacity: Up to 1200HP
• Garrett P/N: 879779-5007S

Performance & Application

The G42-1200 is purpose-built for high-output builds targeting the upper reaches of horsepower capability, with its 73mm/91mm compressor wheel and 82mm/75mm turbine wheel combination delivering the flow characteristics needed to support serious power. The 84 trim turbine wheel paired with the 1.01 A/R v-band turbine housing is engineered for high-flow applications where exhaust housing efficiency directly impacts turbo performance. The ball bearing design provides the response characteristics expected from Garrett’s G Series platform, while the v-band inlet and outlet configuration simplifies installation into custom exhaust manifolds and downpipes. This assembly is best suited for builders running aggressive power targets who need a turbocharger capable of supporting up to 1200HP.

Frequently Asked Questions

What HP can the G42-1200 support?

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

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

The G42-1200 features a ball bearing design.

What is the turbine housing A/R ratio?

The G42-1200 assembly kit comes with a 1.01 A/R v-band inlet/outlet turbine housing.

What is the compressor housing A/R ratio?

The compressor housing A/R on the G42-1200 is 0.85.

What type of inlet and outlet does the turbine housing use?

The turbine housing features a v-band inlet and v-band outlet configuration.

For enthusiasts building toward the top end of the horsepower spectrum, the Garrett G42-1200 (P/N 879779-5007S) delivers the wheel geometry, bearing technology, and housing configuration needed to make it happen reliably.