BorgWarner EFR 6258 T4 .80ar Twin Scroll IWG Turbo *ALUM*

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Special Price $2,059.00 Regular Price $3,183.64

TAGS: EFR 6258 Aluminum Supercore, T4, .80 a/r, Twinscroll, Internally Wastegated, BorgWarner, EFR Series Turbo, 179140, 11581008002


BorgWarner EFR 6258 *ALUMINUM CHRA* T4 .80 ar Twin Scroll IWG Turbo - 11589880036

*Aluminum CHRA*

Compressor Specifications

  • Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
  • Compressor Wheel OD (exducer): 62mm
  • Compressor Wheel Inducer: 49.6mm
  • Max Flow Rate: 44 lb/min
  • Built-in BOV: All EFR compressor housings incorporate an integrated BOV.
  • Compressor Housing: 2.5" inlet, 2.0" hose coupler outlet.

Turbine Specifications - T4, Twin Scroll, .80AR, Internally Wastegated

  • Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
  • Turbine Wheel OD (Inducer): 58mm
  • Turbine Wheel Enducer: 51mm
  • Turbine Outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos
  • Stainless Steel Investment Cast Housing


  • 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 (ALUMINUM) 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
  • Aluminum CHRA

Applicable Part Numbers

  • 11589880036, 11587105002, 11581008002

Borg Warner 6258 EFR Turbo, 225-450 HP. Borg Warner 6258 EFR Turbo is the smallest turbocharger in the ultra-efficient EFR lineup. The 62mm OD compressor has a 49.6mm inducer at 44lb/min max flow - supporting up to 450hp with very large map width for outstanding power potential even at high boost. The Borg Warner 6258 EFR Turbo is the fastest spooling EFR turbo - and fits in a small package. Ideal for small engines in single turbo configuration and stock internal or modified engines. This is an excellent turbocharger for autocross, rally, drift, road racing and street driven applications. The low inertia 58mm Gamma-Ti turbine wheel is optimally matched for maximum response and fastest spool with the FMW compressor wheel. EFR 6258 uses the smallest-sized EFR compressor housing, fitting in the tightest engine bays particularly twin turbo V6 applications. Ideal for use in single turbo applications for the 225-450hp range, or as twin turbo applications 400-700+hp. Ceramic Ball Bearing only, watercooling mandatory.

More Information
Part Number11589880036
Type of PartEFR 6258 (450HP)
Horsepower Gains225 - 450 HP
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