SKU: 179258 | UPC: 840232702934
BorgWarner Turbo EFR B2 8374 0.83 A/R V-Band WG 04-21 Subaru WRX STI
The BorgWarner EFR B2 8374 turbocharger delivers responsive boost with its T3 divided 0.83 A/R turbine housing V-band outlet and integrated wastegate. It fits 2004-2021 Subaru WRX and STI models plus other performance builds requiring quick spool and power up to 450HP. Ball bearing design and high-flow compressor ensure broad powerband for street and track.
Key Features
- Dual Ceramic Ball Bearings: Supports over 200000 RPM for minimal friction and rapid spool under 3000 RPM
- Forged Milled Compressor Wheel: 57.4mm inducer 74mm exducer flows 57 lb/min for efficient airflow in 250-450HP range
- Gamma-Ti Turbine Wheel: 60mm inducer 55mm exducer resists heat for sustained high-RPM performance
- Integrated Boost Solenoid: Factory boost control port enables precise tuning without external valves
- Ported Compressor Housing: Anti-surge design prevents compressor stall during throttle transitions
Product Notes
- Special order processing may add 1-2 days before shipment
- Tuning required for optimal boost levels and air-fuel ratios
- Oil and water lines included for CHRA cooling
Installation Notes
- Professional installation recommended.
- T3 divided manifold flange required for direct bolt-on
- V-band clamps and gaskets sold separately for turbine outlet
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2021 | Subaru | Impreza | WRX STI |
| 2002-2007 | Subaru | Impreza | WRX |
| 2003-2006 | Mitsubishi | Lancer | Evolution VIII IX |
| 2007-2016 | Mitsubishi | Lancer | Evolution X |
| 2007-2013 | BMW | 3 Series | 335i |
Why Choose BorgWarner?
- Direct OEM technology from global racing supplier
- EFR series dominates endurance racing with proven durability
- Precision Swiss manufacturing for consistent fit and flow
Frequently Asked Questions
- Q: Will this bolt onto my 2015-2021 Subaru WRX?
A: Yes with T3 manifold adapter and custom downpipe common in STI swap kits for direct compatibility - Q: What material construction does it use?
A: Nickel-charged compressor housing investment cast turbine housing and Gamma-Ti turbine wheel for heat resistance - Q: What warranty coverage applies?
A: 1-year unlimited mileage from BorgWarner covers defects in materials and workmanship
Shipping & Handling
- Method: Standard Ground
- Availability: In stock – ships same or next business day
- Packaging: Foam protected in 16 x 16 x 16 inch box
- Weight: 22 lbs
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