The Garrett GTW3884JB is a 67mm journal bearing turbocharger built for enthusiasts who demand serious top-end power without sacrificing compatibility with popular aftermarket manifold setups. Engineered as Garrett’s performance answer to the widely used 6766 size turbo, it delivers strong flow potential at a competitive price point. This turbo is the right choice for builders who want a proven journal bearing platform paired with a stainless V-band turbine housing that bolts straight up to existing TiAL flanged manifolds and down-pipes.
Specifications
- Compressor Wheel Inducer: 67.3mm
- Compressor Wheel Exducer: 84.4mm
- Compressor Wheel Trim: 64
- Turbine Wheel Inducer: 74.2mm
- Turbine Wheel Exducer: 64.6mm
- Turbine Wheel Trim: 76
- Turbine Housing A/R: .82
- Turbine Housing Material: Stainless Steel
- Turbine Housing Inlet/Outlet: V-Band Inlet and V-Band Outlet
- Compressor Housing Frame: T04S Frame
- Compressor Housing Inlet: 4″
- Compressor Housing Outlet: 2.5″
- Compressor Housing Feature: Built-in & machined anti-surge
- Bearing Type: Journal Bearing
- HP Potential: 950HP potential flow
- Garrett P/N: GTW3884JB
- Also Known As: GTW6765JB
Performance & Application
Part of Garrett’s GTW Series, this turbo is positioned as the performance solution to the popular 6766 size turbo class, offering great performance at a competitive price. The journal bearing design combined with the T04S frame compressor housing and built-in anti-surge technology supports strong flow potential for high-power builds. The .82 A/R stainless V-band turbine housing is specifically compatible with existing TiAL flanged turbo manifolds and down-pipes, making it a straightforward upgrade or replacement for builders already running that flange standard.
What’s Included
- Stainless Steel V-Band Inlet and V-Band Outlet .82 A/R turbine housing
Frequently Asked Questions
- What HP can the GTW3884JB support?
- The GTW3884JB offers 950HP potential flow capacity.
- Is this a ball bearing or journal bearing turbo?
- The GTW3884JB is a 67mm journal bearing turbo.
- What is the A/R ratio of the turbine housing?
- It comes equipped with a .82 A/R stainless steel V-band turbine housing. A 1.03 A/R V-Band Turbine Housing option is also available in place of the .82 A/R.
- What does GTW6765JB refer to?
- GTW6765JB is an alternate name (aka) for the Garrett GTW3884JB.
- Is the turbine housing compatible with TiAL manifolds?
- Yes, the turbine housing is compatible and mounts to existing TiAL flanged turbo manifolds and down-pipes.
For builders seeking a proven journal bearing alternative to the 6766 class with true TiAL V-band compatibility, the Garrett GTW3884JB delivers the flow potential and housing design to back up a serious high-horsepower build.

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