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BorgWarner EFR 9174 Turbo

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BorgWarner EFR9174 Turbo (12919097002)

BorgWarner EFR 9174 Turbo

The EFR9174 is a hybrid turbo that combines the turbine from 8374 with the compressor from 9180. EFR9174 is intended for applications which will push a turbo to the limit with high boost and critically high turbo shaft speed, especially at altitude. This unique turbo was designed to combine the high flowing 91mm compressor with fast spooling 74mm turbine wheel.  RPM Capabilities have also been improved with higher pressure ratios acheived at lower turbo shaft speed - the use of a 74mm turbine wheel allows for a max turbo speed of 125k RPM.

Compressor Specifications

    • Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
    • Compressor Wheel OD (exducer): 91mm
    • Compressor Wheel Inducer: 67.7mm
    • Max Flow Rate: 95 lb/min
    • Built-in BOV: All EFR compressor housings incorporate an integrated compressor recirculation valve
    • Compressor Inlet: 4″ Ported Shroud Hose Coupler
    • Compressor Outlet: 2.5″ Hose Coupler w/ integrated Vband option

Turbine Specifications

      • Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
      • Turbine Wheel OD: 74mm
      • Stainless Steel Turbine Housing
      • Turbine outlet: GT V-Band (aka 3″ V-Band) ~92mm OD for all EFR turbos


  • Dual Row Ceramic Ball Bearings – lowest friction and fastest spool/response, most extreme durability, built-in 2mm oil restrictor
  • Watercooled Center Section – watercooling is recommended, 14mm banjo bolts
  • Double seals on both turbine and compressor end for extreme durability and resistance to any oil seepage
  • Boost Control Solenoid Valve Integrated to Compressor Housing
  • Integrated Speed Sensor mounting provisions
  • Optional Turbo Speed Sensor Kit
  • Optional Turbo Speed Gauge
  • The EFR 9174 is available in (4) different turbine housing configurations:
    • 0.83 A/R T3 Undivided (Internal WG) #12741008000
    • 0.92 A/R T4 Twin Scroll (Internal WG) #12741008001
    • 1.05 A/R T4 Twin Scroll (External WG) #12741019002
    • 1.45 A/R T4 Twin Scroll (External WG) #12741008003

1.05 A/R T4 Twin Scroll External-WG

0.83 A/R T3 Undivided (Internal WG)

Optional 2000 Degree Coating

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