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BorgWarner Turbine Housing EFR B2 70mm .92 T4 Twin Scroll WG Assy-Turbine Housings-BorgWarner
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BorgWarner Turbine Housing EFR B2 70mm .92 T4 Twin Scroll WG Assy

BorgWarner
BWA12701008016
840232709094
Turbine Housings
Out of stock
$ 1,524.93 $ 1,062.39

SKU: 12701008016 | UPC: 840232709094

BorgWarner Turbine Housing EFR B2 70mm .92 T4 Twin Scroll WG Assy for 2004-2021 Subaru STI 2003-2015 Mitsubishi Evo

This BorgWarner EFR turbine housing fits B2 frame turbochargers like the 9180 series with 70mm turbine wheel. Designed for performance builds on Subaru Impreza WRX STI and Mitsubishi Lancer Evolution models it provides efficient twin scroll exhaust flow for quicker spool-up and strong mid-to-high RPM power. Pair it with matching EFR compressor housing and CHRA for complete turbo assembly.

Key Features

  • T4 Twin Scroll Inlet: Separates exhaust pulses to reduce backpressure and improve turbine response across the powerband
  • 0.92 A/R Ratio: Balances low-end torque with high-flow capacity for street and track driving
  • Integrated Wastegate Assy: Factory actuator delivers precise boost control and eliminates external gate needs
  • Investment Cast Stainless Steel: Resists extreme heat corrosion and fatigue for extended durability in racing conditions
  • B2 Frame 70mm Compatible: Direct bolt-on replacement for EFR 9180 turbochargers in 425-825 HP applications

Product Notes

  • Verify CHRA and compressor housing compatibility before installation
  • Intended for off-road and racing use with proper engine management tuning
  • Special order item processing time varies contact for lead times

Installation Notes

  • Professional installation recommended.
  • Use BorgWarner specified torque values for all fasteners
  • Bolts to standard T4 divided flange V-band outlet standard hardware

This Part Fits

Year Make Model Submodel
2004-2021 Subaru Impreza WRX STI
2015-2021 Subaru WRX STI
2003-2006 Mitsubishi Lancer Evolution VIII/IX
2008-2015 Mitsubishi Lancer Evolution X
2006-2013 BMW 3 Series M3 E92/E90 N54/N55

Why Choose BorgWarner?

  • Global leader supplying turbochargers to major automakers
  • Race-proven components tested in endurance competitions
  • Precision manufacturing ensures consistent fit and flow

Frequently Asked Questions

  • Q: Will this housing fit my EFR 9180 turbo?
    A: Yes it is the OEM-style B2 turbine housing for EFR 9180 with 70mm wheel direct bolt-on replacement
  • Q: What material construction does it use?
    A: Investment cast high-temperature stainless steel designed for sustained 1000+ degree exhaust gas temps
  • Q: What boost levels does it support?
    A: Rated for up to 65 psi with integrated wastegate professional tuning required for optimal performance

Shipping & Handling

  • Method: UPS Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Securely boxed 12 x 12 x 12 inches
  • Weight: 18 lbs

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