Garrett
Garrett G-Series G42-1200
Garrett G-Series G42-1200
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Garrett G42-1200 Turbocharger
Horsepower: 475 - 1200 HP
Displacement: 2.0L - 7.0L
Features:
- G-Series compressor aerodynamics for maximum power
- 73mm compressor inducer / 91mm compressor exducer
- 82mm turbine inducer / 75mm turbine exducer
- Machined speed sensor and pressure ports
- New turbine wheel for increased efficiency and flow
- Stainless steel turbine housings (T4 & V-band options)
- Includes (2) -6AN water fittings
Warning: Max turbo speed is 118krpm. Exceeding this limit may cause damage. A speed sensor (sold separately) can monitor shaft speed.
Performance Notice: Output depends on vehicle modifications and tuning. HP ratings are based on compressor map choke flow (flywheel power potential).
Important Product Information:
Garrett Performance Kits are designed for racing vehicles only and are not legal for public roads. Vehicle modifications using this kit are at your own risk and may void warranties or operating licenses. Compliance with all applicable laws and racing regulations is the user's responsibility.
Reference Data:
| Model | Compressor | Turbine | Trim | A/R | Inlet | Outlet | Wastegate |
|---|---|---|---|---|---|---|---|
| G42-1200 | 73mm / 91mm | 82mm / 75mm | 65 | 0.85 | — | — | — |
| Supercore | 860778-5004S | — | — | — | — | — | — |
| Turbine Kits (G42) | |||||||
| 757707-0011 | — | — | — | 1.01 | V-Band | V-Band | Free Float |
| 757707-0012 | — | — | — | 1.15 | V-Band | V-Band | Free Float |
| 757707-0013 | — | — | — | 1.28 | V-Band | V-Band | Free Float |
| 757707-0014 | — | — | — | 1.01 | T4 | V-Band | Free Float (Yes) |
| 757707-0015 | — | — | — | 1.15 | T4 | V-Band | Free Float (Yes) |
| 757707-0016 | — | — | — | 1.28 | T4 | V-Band | Free Float (Yes) |
Technical Highlights:
- CFD-engineered compressor wheel: 10-blade forged design for faster spool and lower inertia
- Housing options: Compact and standard for G42-1200, standard only for G42-1450
- Integrated speed sensor port: Enables real-time shaft speed monitoring
- Lightweight aluminum backplate (GTX42 uses steel)
- V-band connection: Compatible with GTX42/GTX45 for easy installation
- 360° compressor housing orientation for flexible mounting
- Dual piston rings: Reduce oil leakage into the compressor/turbine stage
- Ceramic dual ball bearing cartridge: 10mm for durability and efficiency
-
Turbine wheel improvements:
- Inconel alloy withstands 950°C
- 10% more flow than GTX42
- Peak efficiency of 77% (vs. GTX42’s 74%)
- 82mm inducer / 75mm exducer, 84 trim
Downloadable Resources:
- Configuration Guide
- Compressor Map
- Exhaust Flow Chart
- Product Photos
- Flange Diagram
- Speed Sensor Kit Installation
Speed Sensor Kits:
- Street Kit (PN: 781328-0003): Includes sensor, wire harness, and gauge
- Pro Kit (PN: 781328-0004): Includes sensor and wire harness
Turbine Housing Details:
- Material: Stainless steel (up to 950°C)
- Connection Types: V-band, T4, free float
- V-band inlet: 92mm (GTX30/35 = 76mm)
- V-band outlet: 109mm
GTX and GT turbine housings are not interchangeable.
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SKU:GAR-860778-5004S
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