Borg Warner EFR Turbocharger 8370 Supercore / Center Housing Rotating Assembly (CHRA) Aluminum

The BorgWarner EFR8370 exhaust gas turbocharger is our first choice when it comes to maximum performance and superior response. Developed with only one goal: uncompromising performance on the road, the racetrack, and the 1/4-mile.

The EFR series stands for state-of-the-art turbocharger technology and the highest quality. With a total of 8 sizes and 7 different turbine housings, BorgWarner covers a performance range of 250 to 1000 hp per turbocharger. The EFR8370 is the perfect solution for high-performance setups in the range of 475 to 700 hp and impresses with an ideal balance of early spool and high peak power.

The combination of a highly efficient compressor wheel, lightweight Gamma-Titanaluminide turbine wheel, and low-friction ceramic ball bearing technology sets new standards in motorsport. The result: extremely fast response, high efficiency, and maximum resilience even under the toughest conditions.

Technical data:

• Performance range: 475–700 hp

• Compressor housing: Inlet 101.6 mm / Outlet 63.5 mm

• Compressor wheel: Inducer 62 mm / Exducer 84 mm

• Turbine wheel: Inducer 61 mm / Exducer 70 mm

• Exhaust housing: Not included (SuperCore)

• Core assembly: B2 series (compatible with EFR 7670 turbine housings)

Compressor side:

• Forged and CNC-milled compressor wheel for maximum strength with minimal weight

• Extended Tip Technology for higher efficiency

• Integrated bypass valve

• Integrated boost control valve

• 360° rotatable thanks to V-band connection

• Preparation for optional speed sensor for precise measurement of compressor speed

Core assembly:

• Dual ceramic ball bearing system for minimized friction and extremely fast spool-up

• Integrated oil restrictor

• Water-cooled for optimal thermal stability

As a SuperCore version, the turbocharger is delivered without an exhaust housing. Thanks to the B2 core assembly, all EFR 7670 turbine housings can be used, which allows for maximum flexibility in tuning.

The suitable turbine housing, oil and water lines, and other accessories can be conveniently selected via the dropdown menu.

Example pictures!