The EFR 6258 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 440hp with very large map width for outstanding power potential even at high boost. The 6258 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 260-440hp range, or as twin turbo applications 400-700+hp. Ceramic Ball Bearing only, watercooling recommended (not mandatory).


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 type: Low Inertia Gamma-Ti Turbine Wheel
• Turbine Wheel OD: 58mm
• Stainless Steel Investment Cast Housing
• Turbine outlet: GT-Vband (aka small 3" vband) ~92mm OD for all EFR turbos
• 0.64 A/R T25 undivided (Internal WG)

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

Wastegate Info: All EFR Internal Wastegated turbos come standard with a medium boost actuator for boost levels of up to 16psi. For boost applications above that will need to add the High Boost actuator. Use the option tab to add it to the order.

V-Band Discharge Flange/Clamp: All of the EFR Internal Wastegated turbos use a special BW Vband flange/Clamp that is not a standard V-Band. The Down Pipe V-Band Flange and Clamp are not included with the turbo. Use Option tab to add them to the order.


*Includes ground shipping within the Continental United States only. Please contact us for all other shipping options.