The Garrett GT2860RS delivers dual ball bearing performance for enthusiasts building small displacement engines who demand the fastest spool-up available in this class. Known widely as the GT28RS, this turbo is engineered for drivers who won’t compromise on throttle response while still chasing serious power numbers. It’s the proven choice for builders who want a turbo comparable to the HKS GT2530 but backed by Garrett engineering.
Specifications
- Bearing Type: Dual Ball Bearing
- Compressor Wheel: 60mm
- Compressor Trim: 62 trim
- Compressor Housing A/R: .60 ar
- Turbine Wheel: 53.85mm
- Turbine Trim: 76 trim
- Turbine Housing A/R: .64 or .86 ar
- Standard Turbine Housing Flange: T25 flanged, internally gated
- Standard Compressor Discharge: 5 bolt GT28 style
- HP Capacity: ~350HP
- Garrett P/N: 739548-5001S
- Also Known As: GT28RS
- Alternate P/N: 739548-5005S
- Alternate P/N: 739548-5009S
- Alternate P/N: 739548-5010S
- Alternate P/N: 739548-5014S
- Alternate P/N: 739548-0001
- Alternate P/N: 739548-0005
- Alternate P/N: 739548-0009
- Alternate P/N: 739548-0010
- Alternate P/N: 739548-0014
- Alternate P/N: 739548-1
- Alternate P/N: 739548-5
- Alternate P/N: 739548-9
- Alternate P/N: 739548-10
- Alternate P/N: 739548-14
Performance & Application
The GT2860RS is built for small displacement engines up to 2.2L, making it a favorite among builders looking to extract maximum response from a compact platform. Its dual ball bearing design gives it the ultimate spool-up time compared to other units in its class, translating to quicker throttle response and a more connected driving feel. This turbo is well suited to enthusiasts prioritizing low-lag performance over sheer top-end power, delivering a flow capacity that rivals well-known competitors like the HKS GT2530. The standard T25 internally gated housing configuration comes with a built-in wastegate actuator, simplifying installation for a true bolt-on spool-focused setup.
Compatibility & Fitment
- Chevy Cobalt platforms
- Small displacement engines up to 2.2L
Frequently Asked Questions
- What HP can the GT2860RS support?
- This turbo has a flow capacity of about 350HP.
- Is this a ball bearing or journal bearing turbo?
- The GT2860RS is a dual ball bearing turbo, giving it the ultimate spool-up time compared to other units.
- What does GT28RS refer to?
- GT28RS is an alias for the Garrett GT2860RS.
- Does the standard housing include a wastegate actuator?
- Yes — the standard configuration comes pre-assembled with the T25 flanged, internally gated turbine housing and includes an internal wastegate actuator. Alternate turbine housing options, such as a T3 flanged 4 bolt or T3 flanged 5 bolt, do not include the wastegate actuator with the turbo.
For builders who demand instant response from a small displacement platform without sacrificing proven Garrett reliability, the GT2860RS remains a benchmark choice in its class.
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