Garrett GTW3884JB 67mm (aka GTW6765JB) Journal Bearing Tbo .81 A/R T4 UND W/ 3″ VB 81mm cen grv

The Garrett GTW3884JB delivers serious top-end power potential for enthusiasts building a high-horsepower platform that demands durability without the premium of a ball bearing core. As part of Garrett’s GTW Series, this journal bearing turbocharger was engineered as a performance-driven, cost-effective alternative to the popular 6466 size turbo, giving builders a proven path to big power at a competitive price point.

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 A/R: .81 A/R
• Turbine Housing: T4 undivided with 3″ V-band and 81mm center groove
• Bearing Type: Journal bearing
• Compressor Housing: T04S Frame
• Compressor Inlet: 4″
• Compressor Outlet: 2.5″
• Anti-Surge: Built-in & machined
• HP Potential: 900 HP
• Garrett P/N: GTW3884JB
• Also Known As: GTW6765JB

Performance & Application

Built around a 67mm compressor wheel and 81mm center groove turbine housing, this GTW3884JB is positioned as Garrett’s high-performance solution for builders who have historically looked to the 6466 size class. The .81 A/R T4 undivided turbine housing is tuned for strong top-end flow while the T04S compressor frame with built-in and machined anti-surge technology supports a broad, efficient operating range. For those seeking a slightly different spool and flow characteristic, this turbo is also available with a .96 A/R turbine housing option. This configuration suits builders chasing high-horsepower output on journal bearing reliability rather than the added cost of a ball bearing core.

Frequently Asked Questions

What HP can the GTW3884JB support?

This turbo has a 900 HP potential flow rating.

Is this a ball bearing or journal bearing turbo?

The GTW3884JB is a journal bearing turbocharger.

What turbine A/R and housing configuration does this turbo use?

It comes standard with a .81 A/R T4 undivided turbine housing featuring a 3″ V-band and 81mm center groove. A .96 A/R option is also available in place of the standard .81 A/R.

What does GTW6765JB refer to?

GTW6765JB is an alternate name (alias) for the Garrett GTW3884JB.

For enthusiasts seeking a proven, high-flowing alternative to the traditional 6466 platform, the Garrett GTW3884JB delivers the journal bearing durability and 900 HP capability needed to back up a serious build.