Borgwarner EFR 9274


The EFR9274 is a brand new release for 2019 and represents the state-of-the-art from BorgWarner Turbo Systems. Representing the next evolution of the wildly popular EFR9174, the brand new EFR9274 is intended for applications which will push a turbo to the limit with high boost and critically high turbo shaft speed. Recommended for competitive drift and time attack applications, this unique turbo was designed specifically by BW engineering to combine the high flowing 91mm compressor exducer with 72mm compressor inducer to shift the surge line and allow the same footprint to breathe a LOT better up top.  Efficiency plateaus are widened as a result.  RPM Capabilities have also been improved with higher pressure ratios acheived at lower turbo shaft speed.  Using the same 74mm Gamma-Ti turbine wheel from the EFR9174, this turbo flows an impressive 106lbs/min of air at 125k RPM maximum shaft speed.
  • Larger compressor wheel inducer diameters increases air flow for increased power capabilities
  • New anodized compressor wheels shaped to maximize flow and new compressor covers to match the contour of the new wheels
  • Along with increasing the wheel size, the compressor wheel blade shape and contour have been optimized to maximize flow while minimizing efficiency hits. BorgWarner also created a distinct compressor cover contour profile to maximize the air flow through the turbocharger. The new compressor wheels have been anodized black for visual impact and to differentiate the new models from existing EFR Series products. With the design changes to the compressor wheel and cover, the company’s latest aftermarket parts will provide up to an extra 200 horsepower (hp) than was previously possible when they are released later this year.
  • For those seeking higher power, BorgWarner’s new EFR 8474, EFR 9274 and EFR 9280 super-cores have compressor wheel inducer diameters between four and six millimeters larger than its existing EFR 8374, EFR 9174 and EFR 9180 products.

Compressor Specifications

    • Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
    • Compressor Wheel OD (exducer): 91mm
    • Compressor Wheel Inducer: 72mm
    • Max Flow Rate: 106 lb/min
    • Built-in BOV: All EFR compressor housings incorporate an integrated compressor recirculation valve ( block off plates available if not desired)

Compressor Housing Connections:

  • Inlet: 4″ Ported Shroud Hose Coupler
  • Outlet: 2.5″ Hose Coupler w/ integrated Vband option( requires cutting for 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 (mates to standard 3″ V-Band) ~92mm OD for all EFR turbos

Aluminum super core part # 12747100021

Steel super core part # 12747100023