Turbine Housing, Garrett G25-EXT W/G REVERSE, .92 A/R w/ Vband Entry/Exit PN: 740902-0074

The Garrett G25-EXT reverse rotation turbine housing is engineered for builders running externally wastegated setups who demand precise control over boost management and turbine efficiency. This housing is purpose-built for high-performance applications where reverse rotation compressor orientation and V-band plumbing are required for optimal packaging and exhaust routing. It’s the right choice for enthusiasts building a G25-based turbo system that prioritizes flow efficiency and installation flexibility.

Specifications

• A/R Ratio: .92
• Turbine Inlet/Outlet: V-band entry/exit
• Wastegate Configuration: Externally wastegated
• Rotation: Reverse rotation
• Series: Garrett G25
• Garrett P/N: 740902-0074

Performance & Application

This turbine housing is designed for high-boost applications demanding quick spool and peak flow efficiency. The externally wastegated configuration allows for dedicated boost control plumbing, giving builders greater flexibility over wastegate sizing and placement compared to internally gated housings. Its reverse rotation orientation makes it suited for platforms where compressor and turbine positioning must be mirrored relative to standard G25 configurations. The V-band entry and exit design streamlines installation for custom exhaust and downpipe fabrication.

Frequently Asked Questions

What is the A/R ratio of this G25 turbine housing?

This turbine housing features a .92 A/R ratio.

Is this turbine housing internally or externally wastegated?

This is an externally wastegated turbine housing, giving builders the ability to run a separate external wastegate for boost control.

What type of inlet and outlet flanges does this housing use?

This housing uses V-band flanges for both the entry and exit.

What does “reverse rotation” mean for this G25 housing?

This housing is configured for reverse rotation, meaning the turbine and compressor orientation is mirrored relative to a standard G25 turbine housing.

For builders who need externally wastegated boost control paired with reverse rotation packaging and V-band convenience, this Garrett G25 .92 A/R turbine housing delivers the flow efficiency and installation flexibility high-output builds demand.