ATP Turbine Housing, G25-550/660, .92 A/R, Open T3 Inlet, 3″ GT VB Outlet

This ATP turbine housing is purpose-built for the Garrett G25-550 and G25-660 turbochargers, designed for enthusiasts and builders who need a precise, standard-rotation fitment without guesswork. It delivers a direct-fit solution for those running G-series turbos who require a specific inlet and outlet configuration to match their exhaust manifold and downpipe setup, making it a straightforward choice for serious builds.

Specifications

• A/R Ratio: .92
• Turbine Inlet: T3 Inlet, undivided (open)
• Outlet: 3″ GT V-band
• Outlet OD: 90mm OD
• Centering Ring: 81mm
• Rotation: Standard rotation
• Compatible Turbo Models: G25-550, G25-660

Performance & Application

This turbine housing is engineered specifically for the G25-550 and G25-660 within the Garrett G-series lineup, giving builders a standard-rotation option for their turbo system. The undivided T3 inlet design pairs with a 3″ GT V-band outlet, offering a clean interface for exhaust routing on performance builds using these G25 turbochargers. For builders seeking a different exhaust flow characteristic, an alternate .61 A/R version of this same T3 turbine housing is also available.

Compatibility & Fitment

• Garrett G25-550 turbocharger
• Garrett G25-660 turbocharger

Frequently Asked Questions

What turbochargers is this turbine housing compatible with?

This turbine housing is designed for the Garrett G-series G25-550 and G25-660 turbochargers in standard rotation configuration.

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

This housing has a .92 A/R ratio. An alternate .61 A/R T3 turbine housing option is also available.

What type of turbine inlet does this housing use?

It uses a T3 inlet that is undivided, also referred to as an open T3 inlet.

What outlet configuration does this turbine housing have?

It features a 3″ GT V-band outlet with a 90mm OD and an 81mm centering ring.

For G25-550 and G25-660 builds requiring a standard-rotation, open T3 inlet housing with a 3″ GT V-band outlet, this .92 A/R configuration delivers the precise fitment performance builders demand.