Garrett GTW3884JB 67mm (aka GTW6765JB) Journal Brn Turbo .95 A/R T4 Div w/ 3″ VB Exit

The Garrett GTW3884JB is a 67mm journal bearing turbocharger built for enthusiasts and builders chasing serious, reliable power without the premium cost of a ball bearing unit. Engineered as a performance-driven alternative to the popular 6466-size turbo, it delivers strong compressor efficiency and turbine flow in a package suited for high-horsepower street and race builds. This turbo is built to feed big power while keeping installation flexibility for serious engine platforms.

Specifications

• Compressor Wheel Inducer: 67.3 mm
• Compressor Wheel Exducer: 84.4 mm
• Compressor Wheel Trim: 58
• Turbine Wheel Inducer: 74.2 mm
• Turbine Wheel Exducer: 64.6 mm
• Turbine Wheel Trim: 76
• Turbine Housing: .95 A/R, T4 divided flange
• Turbine Housing Exit: 3″ GT V-band
• Compressor Housing: T04S frame
• Compressor Inlet: 4″
• Compressor Outlet: 2.5″
• Compressor Housing Feature: Built-in & machined anti-surge
• Bearing System: Journal bearing
• HP Potential: 900 HP flow capacity
• Garrett P/N: GTW6765JB (GTW3884JB)
• Also Known As: GTW6765JB

Performance & Application

The GTW3884JB is designed for builders targeting the 900 HP range who need a durable, cost-effective journal bearing solution without sacrificing turbine and compressor flow capability. The .95 A/R T4 divided turbine housing helps maintain strong exhaust pulse separation for improved spool characteristics on high-output builds, while the V-band exit simplifies downpipe fabrication and improves flow at the turbine outlet. The T04S frame compressor housing is matched to the 67mm compressor wheel to support serious airflow demands. This configuration is well suited to boosted platforms running T4 divided manifolds and looking for a proven, high-flowing 6466-class turbo alternative for drag, road race, or high-horsepower street applications.

Frequently Asked Questions

What HP can the GTW3884JB support?

The GTW3884JB carries a 900 HP flow capacity, making it suitable for high-horsepower street and race builds.

Is this a ball bearing or journal bearing turbo?

The GTW3884JB uses a journal bearing system, offering a cost-effective alternative to ball bearing units while still delivering serious, reliable power.

What turbine housing and exit configuration does this turbo use?

It features a .95 A/R T4 divided turbine housing with a 3″ GT V-band turbine housing exit.

What does GTW6765JB refer to?

GTW6765JB is the alternate name for the Garrett GTW3884JB turbocharger.

For builders who demand proven flow, durable construction, and a cost-effective path to serious horsepower, the GTW3884JB delivers a high-flowing, 6466-class journal bearing solution built for the demands of drag, road race, and high-output street platforms.