BorgWarner EFR6258 .64 A/R T2 Turbo

The Borg Warner EFR 6258 is the smallest and fastest spooling EFR turbocharger in the lineup. Ideal for small engines in single OR twin turbo configuration, this is an excellent turbocharger for autocross, rally, drift, road racing and street driven applications. The 62mm OD compressor has a 49.6mm inducer rated at 44lb/min max flow - supporting up to 440hp. This compressor wheel is versatile with very large map width for outstanding power potential, even at high boost. The low inertia 58mm Gamma-Ti turbine wheel is optimally matched for maximum response and fast spool with the FMW compressor wheel. EFR 6258 uses the smallest-sized EFR compressor housing, making fitment in the tightest engine bays possible. 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.

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 (recommended) OR 55mm

Stainless Steel Turbine Housing

0.64 A/R T2 Housing(Internal WG) - Part # 179150

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 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