Garrett GBC22: Specs, Fitment, and Is It Worth It

The Garrett GBC22-350 Club Line Turbocharger (896055-5003S) is a complete, ready-to-install single-turbocharger unit in Garrett's Club Line series, rated to support approximately 350 horsepower and featuring an integrated internal wastegate to simplify installation on compact performance builds. Unlike the GTX and G Series Super Core platforms, which require separate turbine housing, wastegate, and associated plumbing purchases, the Club Line GBC22-350 is a self-contained unit: compressor housing, turbine housing, CHRA, and internal wastegate are all integrated into the assembly. The turbine housing uses a 0.64 A/R Open/V-Band (O/V) inlet and a V-Band outlet, and the exhaust manifold connection is a T25 5-bolt flange -- the standard flange specification used by a wide range of OEM and performance manifolds on Japanese, European, and domestic compact 4-cylinder engines where the T25 is the stock or established performance manifold interface. The GBC22-350 is the largest unit in the Club Line series sold in this catalog, sitting above the GBC20-300 and GBC17-250 in the Club Line lineup. This guide covers the Garrett GBC22-350 specifications, how the Club Line format compares to modular Super Core builds, and where this Garrett Turbocharger fits in compact performance applications.

Specifications: Garrett GBC22-350 Club Line Turbocharger

The GBC22-350 Club Line Turbocharger is a complete self-contained unit with the following key specifications:

• Part number: 896055-5003S
• Power rating: Approximately 350 horsepower target
• Turbine housing A/R: 0.64 O/V (Open V-Band inlet, V-Band outlet)
• Exhaust manifold flange: T25 5-bolt
• Wastegate type: Integrated internal wastegate -- actuator and valve are built into the turbine housing assembly; no separate external wastegate canister or dump tube required
• Configuration: Standard rotation, complete turbocharger assembly ready for installation with oil and coolant connections

The Club Line format makes the GBC22-350 a direct-fit upgrade or replacement option for builds where the T25 5-bolt manifold flange is already in place. Builds on Honda K-series and B-series engines with T25-flanged performance manifolds, Mitsubishi 4G63 and 4B11 applications, and other compact 4-cylinder platforms where T25 manifolds are established in the performance community can install the GBC22-350 onto the existing manifold without fabricating new flanges or purchasing a turbine housing separately. The O/V turbine housing inlet accepts a V-Band discharge from the manifold or a compound configuration where the GBC22-350 receives charge from an upstream primary.

Within the Club Line series, the GBC22-350 sits at the top of the T25/5-Bolt sub-group. The GBC20-300 (896053-5003S, 0.55 O/V, T25/5-Bolt) is a one-step-down option at a 300hp rating, and the GBC17-250 (896052-5003S, 0.50 O/V, T25/5-Bolt) is the smallest T25/5-Bolt Club Line unit at 250hp. All three share the T25 5-bolt manifold interface, so a build that needs to step between Club Line sizes does not require manifold changes.

Top Picks: Garrett GBC22-350 and Club Line T25 Series

For builds on T25 5-bolt manifolds targeting approximately 350 horsepower with a complete bolt-on turbocharger unit, the Garrett GBC22-350 Club Line Turbocharger 0.64 O/V T25 / 5-Bolt Internal WG (896055-5003S) is the top Club Line option in this catalog for T25-flanged applications and provides an integrated internal wastegate that removes the need for separate wastegate hardware. Builds at a lower power target or with a smaller displacement engine that reaches full boost more efficiently with a tighter compressor wheel can step to the Garrett GBC20-300 Club Line Turbocharger 0.55 O/V T25 / 5-Bolt Internal WG (896053-5003S) at 300hp or the Garrett GBC17-250 Club Line Turbocharger 0.50 O/V T25 / 5-Bolt Internal WG (896052-5003S) at 250hp, both of which share the T25 5-bolt manifold connection and internal wastegate design. Browse the full Garrett Club Line and G Series turbocharger catalog for additional options across the complete Garrett lineup.

Match to the Build

• Compact 4-cylinder sport build targeting 300-350 horsepower on a T25-flanged performance manifold: The GBC22-350 is the direct fit for builds where a T25 5-bolt performance manifold is already in place and the power target is at or near 350hp; the complete unit format removes the need to source a separate turbine housing, external wastegate, and dump tube -- the internal wastegate handles boost control through the existing boost controller or MAP-referenced actuator line, and the V-Band downpipe outlet connects to a standard V-Band exhaust adapter or flex section
• Replacement for a worn or undersized OEM or aftermarket T25-flanged turbocharger on a built engine: Many OEM turbocharged 4-cylinder engines from the 1990s and 2000s use T25 or T25-equivalent flange patterns on the factory manifold; a built engine with upgraded internals and tuning that has outgrown the factory turbocharger's compressor map can step to the GBC22-350 as a direct manifold-fit replacement that provides Garrett's current billet compressor specification and updated bearing design within the same footprint
• Sport compact build where simplicity of installation is a priority over maximum peak power ceiling: The Club Line format reduces the parts list compared to a Super Core build -- one purchase covers the complete turbocharger; builders who want a known-configuration bolt-on unit for a weekend build without sourcing a Super Core, turbine housing, external wastegate, and actuator separately benefit from the all-in-one Club Line assembly; the GBC22-350's 350hp ceiling covers most bolt-on compact builds without requiring the added complexity of a modular system
• Step up from GBC20-300 on an existing Club Line build where the 300hp unit has been outgrown: A build running the GBC20-300 that has added power through fueling, cam, or engine displacement changes and is pushing against the GBC20-300's compressor ceiling can step to the GBC22-350 using the same T25 5-bolt manifold; no manifold fabrication is required; the V-Band downpipe outlet is the same across the Club Line T25 series, so the exhaust connection does not change

Signs the Turbocharger Needs Replacement

• Compressor surge at peak boost -- a stutter or flutter under wide-open throttle at the top of the RPM range where the current turbocharger's compressor wheel is operating past its surge line; on a build that has grown beyond its current turbocharger's rating through fueling or engine work, the GBC22-350's larger compressor map provides the additional surge margin and flow ceiling to cover the new power target on a T25-flanged manifold
• Bearing noise or shaft play at the compressor inlet -- mechanical wear at the center section producing a grinding or vibration that changes with RPM and boost demand; detectable as radial movement of the compressor wheel in the housing; the Club Line assembly is a complete replacement unit rather than a rebuildable Super Core, so a bearing-worn GBC22-350 is replaced as a unit rather than rebuilt at the bearing level
• Oil in the intake charge downstream of the compressor outlet -- compressor-side seal wear causing oil to enter the charge air and produce an oily film inside the charge pipe between the compressor outlet and the intercooler; progressive seal degradation on a high-cycle turbo generates increasing oil consumption in the charge; the GBC22-350 unit replacement addresses the seal condition as part of the complete assembly
• Internal wastegate rattle or boost control instability -- wastegate valve wear or actuator degradation producing inconsistent boost pressure or a mechanical rattle from the turbine housing at idle and low RPM; on a Club Line unit where the wastegate is integrated into the housing assembly, valve and actuator wear is corrected by replacing the complete unit; boost pressure spikes above the target, boost creep at high RPM, or irregular boost curves are signs of wastegate performance degradation

Frequently Asked Questions

What is the difference between a Club Line turbocharger and a GTX Super Core?

The Club Line GBC22-350 is a complete turbocharger assembly with compressor housing, turbine housing, CHRA, and internal wastegate integrated into one unit ready for installation. A GTX or G Series Super Core is a modular system: the Super Core covers the CHRA and compressor housing, but the turbine housing, external wastegate, and actuator are purchased and installed separately. The Club Line approach simplifies the parts list and reduces installation complexity for builds where the T25 manifold interface is already in place and the power target is within the Club Line range. The modular Super Core approach provides more flexibility to select A/R ratio, inlet type, and wastegate specification independently -- suited to builds with specific housing or wastegate requirements that the all-in-one Club Line format does not address.

Bottom Line

The Garrett GBC22-350 Club Line Turbocharger (896055-5003S) is the largest T25/5-bolt Club Line unit in this catalog, covering compact 4-cylinder builds to approximately 350 horsepower with a complete bolt-on assembly and integrated internal wastegate. It fits directly onto T25 5-bolt exhaust manifolds and provides a straightforward upgrade path from the GBC20-300 and GBC17-250 without manifold changes.