Compressor Specifications

• Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
• Compressor Wheel OD (exducer): 83mm
• Compressor Wheel Inducer: 62mm
• Max Flow Rate: 75 lb/min
• Built-in BOV: All EFR compressor housings incorporate an integrated BOV.
• Compressor Housing: 3.5" inlet, 2.0" hose coupler outlet.

Turbine Specifications

• Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
• Turbine Wheel OD (Inducer): 70mm
• Turbine Wheel Enducer: 61mm
• Turbine Outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos
• Stainless Steel Investment Cast Housing

Turbine Housing Options *Please Select in Option Menu

• T3, .83ar, Internally Wastegated - (12701008014)
• T4 Twin Scroll, .92ar, Internally Wastegated - (12701008016)
• T4 Twin Scroll, 1.05ar, Externally Wastegated - (12701019047)
• None - I want the supercore only

Features

• Dual Row Ceramic Ball Bearings - lowest friction  and fastest spool/response, most extreme durability, built-in oil  control orifice - (aka oil restrictor) **no restrictor can be used with  EFR turbos
• 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
• Iron CHRA

Applicable Part Numbers

• 12709097007, 12709097008, 12701008014, 12701008016, 12701019047

Borg Warner 8370 EFR Turbo 475-700 HP. Borg Warner  8370 EFR Turbo is engineered to support big power levels yet spool fast  enough for professional time attack teams. The 70mm Gamma-Ti turbine  wheel is the optimal match for the 61mm inducer / 83mm exducer FMW  compressor wheel and is capable of 79lb/min airflow and 45+psi boost.  This is one of the most exciting turbos in the EFR lineup for the  high-power addicts. This turbo is ideal for use in single turbo  applications for the 475-700hp range, or as twin turbo applications  >1300+hp. Ceramic Ball Bearing only, watercooling optional  (recommended)

Borg Warner's latest release, the EFR (Engineered for Racing) Series  turbochargers. EFR is currently the most advanced turbo of its type  engineered for the performance aftermarket. Crammed full of attributes  that appeal to the performance car enthusiast, EFR is at the pinnacle of  what can be done with the current state of the art.

The EFR line of turbos was born out of an internal BorgWarner Turbo  Systems program labeled Advanced Aftermarket Products or AAP.

The result is the new EFR (Engineered for Racing) line of turbos from  BorgWarner. These turbos contain a bevy of key attributes such as Gamma  Ti turbine wheels, dual ceramic ball bearing cartridges and investment  cast stainless steel turbine housings. Collectively, those features help  give the EFR line its innovative appeal and will provide a breakthrough  experience in durability, device responsiveness and installer/user  satisfaction.