BorgWarner EFR 6258 A

EFR 6258 A

-Iron core

-A/R 0.64

-T25 Single scroll

260-400 HP RANGE

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

• Turbine Wheel Material: Low Inertia Gamma-Ti Turbine Wheel
  
• Turbine Wheel OD: 58mm (recommended) OR 55mm
  
• Turbine Housing Material: Stainless Steel Sand Cast Housing
  
• Turbine outlet: GT-Vband (aka small 3″ vband) ~92mm OD for all EFR turbos 

FEATURES

• 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 smallest EFR turbo in the lineup, the 6258 packs a lot of fun in a small package.  Used on a variety of applications from Mazda Miatas to Subaru EJ25, if early spool and 250-400hp are the goal, this turbo is absolutely phenomenal.  It also works well for twin turbo applications in the 500-800hp range for unreal performance on 3.5L ecoboost, RB26 and 2JZ applications.