BorgWarner Airwerks S257SX-E (7670)

A cost effective variant of BorgWarner's EFR 7670, the ‘SX-Enhanced’ turbos redefine performance, durability, and value. Featuring the latest generation  billet EFR compressor wheel aerodynamics and uprated 360-degree thrust assemblies, the 70mm Inconel turbine wheel borrows aero from the EFR 7670, along with the same 57.2mm inducer / 76mm exducer EFR compressor in a purpose-built S200 SXE compressor housing.  A higher performing and heavily updated version of the old "S256" turbocharger, this BorgWarner turbo is an excellent match for the 400-600hp range (up to 2.6L) or as twin-turbos in 700-1100hp applications. It is oil-cooled journal bearing only.

• Compressor Wheel Exducer: 76.20mm
• Compressor Wheel Inducer: 57.15mm
• Max Flow Rate: 64 lbs/min
• Max Recommended Turbo Speed: 560 m/s
• Compressor Housing Connections:Inlet: 3.5″ Hose Coupler
• Outlet: 2.0″ Hose Coupler

• Turbine Wheel Exducer: 61.43mm
• Turbine Wheel Inducer: 70mm
• Housing Size and A/R ratio: S257SX-E 7670 is available in six (6) different turbine housing configurations:0.83 A/R Divided T4 Twin Scroll Inlet
• 1.00 A/R Divided T4 Twin Scroll Inlet
• 1.09 A/R Divided T4 Twin Scroll Inlet
• 1.15 A/R Divided T4 Twin Scroll Inlet
• 1.22 A/R Divided T4 Twin Scroll Inlet
• 1.27 A/R Divided T4 Twin Scroll Inlet
• Turbine outlet: 3″ Marmon or Optional 3″ V-Band Upgrade ($150)

• 3.5″ inlet / 2″ outlet compressor housing with new aero, integrated speed sensor port and pre-machined boost port
• All-new severe-duty 360-degree thrust bearing
• Interchangeable with existing turbine housings
• Inconel 70mm turbine wheel, same blade shape as EFR7670
• Optional Turbo Speed Sensor Kit
• Optional Turbo Speed Gauge

Simple. Scalable. Strong. Airwerks turbochargers are designed for the competitive motorsports market as well as drivers retrofitting a naturally aspirated engine or looking for a little more performance from a factory turbocharged car. Engineered specifically for drag racing, pulling, and road racing, AirWerks turbochargers have earned a reputation as robust, brute-force induction systems. Looking for a no-frills replacement? Want to upgrade your turbocharger? Working with limited space?

BorgWarner’s AirWerks turbochargers are the perfect go-to product for many applications. AirWerks turbochargers feature an effective high-pressure ratio compressor stage, extended-tip technology, and a high-efficiency turbine stage with a twin hydrodynamic journal bearing design. 

Looking to ensure you get the perfect turbo for your unique application the first time? Full-Race is here to help. Our customized turbo matching and system integration services use accurate operating parameter plotting to eliminate guesswork and trial and error. As turbocharging continues to grow globally, our unwavering commitment to high standards ensures unrivaled quality, reliability, and performance. Email us at gofaster@full-race.com or call us at (602) 437-2101 to find out how we can help you achieve your goals.

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