The Garrett GT2971R-90T CHRA is the core building block for enthusiasts and shop builders who demand precise, aggressive boost delivery from a compact ball bearing platform. Configured with a 90 trim turbine wheel and paired compressor wheel, this cartridge is purpose-built for tuners chasing strong mid-range response on mid-displacement engines. It’s the right choice for anyone assembling or rebuilding a GT3071R-WG based turbo system who needs a verified, spec-accurate core.

Specifications

• Compressor Wheel: 71mm, 56 Trim
• Turbine Wheel: 56.5mm, 90 Trim
• Bearing Type: Ball Bearing
• Wastegate Configuration: Integral Wastegate Compatible
• HP Capacity: Up to 500+ hp
• Garrett P/N: GT2971R-90T
• Also Known As: GT3071R-WG with 90 trim 56.5mm turbine wheel
• Compatible Turbo P/N’s: 700382-5020s, 700177-5004s

Performance & Application

This CHRA is engineered for 2.0L–3.0L engine platforms where builders need strong mid-range boost without sacrificing top-end capability. The ball bearing core reduces spool lag compared to journal bearing designs, giving the 90 trim turbine wheel a responsive, aggressive character under load. Its integral wastegate compatibility makes it well suited for builders standardizing on a self-contained boost control setup rather than an external wastegate. With capacity rated up to 500+ hp, it fits serious street and performance builds looking to extract more from mid-displacement engines.

Frequently Asked Questions

What HP can the GT2971R-90T support?

This CHRA supports up to 500+ hp applications.

Is this a ball bearing or journal bearing CHRA?

The GT2971R-90T uses ball bearing construction.

What compressor and turbine wheel sizes does this CHRA use?

It uses a 71mm 56 trim compressor wheel paired with a 56.5mm 90 trim turbine wheel.

What does GT3071R-WG refer to?

GT3071R-WG is