SKU: 12741008001 | UPC: 840232711165
BorgWarner Turbine Housing EFR B2 74mm .92 T4 Twin Scroll WG Assy for 2002-2021 Subaru STI Evo
BorgWarner EFR B2 74mm .92 T4 twin scroll turbine housing assembly delivers responsive boost buildup and high exhaust flow for EFR 7670 turbochargers. Designed for performance builds on Subaru WRX STI 2002-2021 Mitsubishi Lancer Evolution 2003-2016 and similar 4-cylinder applications producing 450-750 horsepower. Cast Ni-Resist construction handles extreme heat while integrated wastegate ensures accurate control.
Key Features
- Twin Scroll T4 Inlet: Separates exhaust pulses for faster spool-up and improved turbine efficiency across the powerband
- .92 A/R Ratio: Provides balanced top-end power with strong mid-range response in street and track setups
- Integrated Wastegate: V-band mounted actuator position at 12 o’clock for simple plumbing and reliable boost management
- V-Band Turbine Outlet: Quick-release connection simplifies assembly swaps and reduces leaks
- Ni-Resist Casting: High-nickel ductile iron withstands 1050C turbine temps for long-term durability
Product Notes
- Requires matching EFR 7670 CHRA and compressor housing for complete turbo assembly
- Inspect wastegate actuator function prior to installation
- Secure packaging protects against shipping damage
Installation Notes
- Professional installation recommended.
- Use ARP or equivalent V-band clamps for secure sealing
- Compatible with standard EFR B2 frame mounting hardware
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2007 | Subaru | Impreza | WRX STI |
| 2008-2021 | Subaru | Impreza | WRX STI |
| 2003-2005 | Mitsubishi | Lancer | Evolution VIII |
| 2006-2015 | Mitsubishi | Lancer | Evolution IX X |
| 2015-2021 | Subaru | WRX | STI |
Why Choose BorgWarner?
- Trusted OE supplier for global automakers with motorsport heritage
- EFR series proven in Formula Drift and rally racing
- Precision CNC-machined ports for consistent flow
Frequently Asked Questions
- Q: Does this housing fit the EFR 7670 turbo?
A: Yes pairs directly with EFR 7670 ball-bearing CHRA part 179397 and B2 frame compressor housings - Q: What material is used for high heat?
A: Ni-Resist high-nickel iron casting rated for sustained 1050C operation - Q: Is wastegate actuator included?
A: Housing assembly includes actuator ready V-band mount actuator sold separately
Shipping & Handling
- Method: Standard ground shipping
- Availability: In stock – ships same or next business day
- Packaging: Foam protected box 14x14x14 inches
- Weight: 11 lbs
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