Borg Warner 179150 EFR 6258 T25 A/R 0.64 WG turbocharger
For: universal
Clean-sheet concepts. Loaded with innovations. Engineered For Racing.
What kind of turbocharger would you build for your high-performance car? The engineers in BorgWarner’s Advanced Aftermarket Product group created a wish list of every notable design characteristic. They used materials that had never been combined into an aftermarket turbocharger. They delivered quick boost response, powerful performance and reliable durability.
The EFR (Engineered For Racing) turbochargers from BorgWarner offer an unprecedented combination of advanced technologies:
- Low-weight Gamma-Ti turbine wheels and shaft assemblies for quick boost response
- Patent-pending dual ceramic ball bearing cartridges for more thrust capacity, durability and turbine efficiency at low expansion ratios
- Stainless steel turbine housing for increased efficiency, improved durability and corrosion resistance
- Range of units supporting 225 to 1,000 horsepower per turbocharger
Borg Warner 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).
The EFR 6258 is available in two different turbine housing configurations:
- 0.64 A/R T25 undivided (internal WG)
- 0.80 A/R T4 twinscroll (internal WG)
Features:
- Gamma-Ti turbine wheel
- Integrated Compressor Recirculation Valve (CRV)
- Dual ceramic ball bearing assembly with metal cage
- Boost Control Solenoid Valve (BCSV)
- Forged Milled Compressor Wheel (FMW)
- Extended tip technology
- Compressor cover with speed sensor mounting provisions
- 3" v-band turbine outlet (92 mm output diameter) for all 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
