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Full Race Borgwarner EFR 8370 Turbo 1.05 A/R T4 Twin Scroll Inlet (External WG) - Aluminum CHRA


Full Race

Model #EFR-8370

Shopper Award

Tailoring to the need to push pressure ratio and rotor speeds to the limits, as evidenced by 2021 Pikes Peak Championship winner Robin Shute - The 475 to 700 HP capable EFR 8370 pairs the high pressure ratio compressor from the EFR 8374 with the turbine from the EFR 7670. The tip speed of the 70mm turbine wheel is slower than the 74mm turbine wheel rotating at the same shaft speed, which provides additional altitude and pressure ratio margin allowing for high boost without overspeed. The 8370 is a useful option for customers looking to utilize higher boost pressures than the 7670 can support without stepping up to the larger, less responsive 8374's 74mm turbine wheel.


  • Dual Row Ceramic Ball Bearings - lowest friction and fastest spool/response, most extreme durability, built-in 2mm oil restrictor
  • 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
Compressor Specificatons:
  • Compressor Type: Forged-Milled Wheel (FMW) Extended Tip
  • Compressor Wheel OD (Exducer): 83mm
  • Compressor Wheel Inducer: 62.6mm
  • Max Flow Rate: 79 lb/min
  • Built-in BOV: All EFR compressor housings incorporate an integrated compressor recirculation valve
  • Compressor Inlet: 4" Ported Shroud Hose Coupler
  • Compressor Outlet: 2.5" Hose Coupler w/ integrated Vband option
Turbine Specifications:
  • Turbine Type: Low Inertia Gamma-Ti Turbine Wheel
  • Turbine Wheel OD: 70mm
  • Stainless Steel Turbine Housing
  • Turbine Outlet: GT V-Band (aka 3" V-Band) ~92mm OD for all EFR turbos

Proposition 65

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About Full Race Motorsports

Full Race Motorsports was founded in 2002 by a man named Geoff Raicer. Since its inception nearly 20 years ago, Full Race has set out to engineer and manufacture top-of-the-line turbo systems and supporting hardware for both four- and six-cylinder engines. Full Race’s new-school approach toward engineering and fabrication has earned them a spot at the forefront of the automotive industry when it comes to turbocharger exhaust manifolds and state-of-the-art complete turbo kits.

Full Race Turbo Experts

With clients in more than 90 countries worldwide, Full Race Motorsports’ comprehensive line of turbos, intercoolers, intakes, and exhausts have set the standard for turbo systems and components. The company’s vast customer base ranges from professional race teams to OEM manufacturers and grassroots car enthusiasts. Full Race has and continues to work with high-level organizations like Sierra/Cosworth, BorgWarner, Garrett, Ford Motor Company, MHI, Honda of America, Toyota NA, Sierra Sierra/Cosworth, T1 Race Developments and Papadakis Racing. These professional and OE manufacturer partnerships help Full Race Motorsports lead by example and remain on the cutting edge of turbo innovation.

What Does Full Race Offer?

Today, Full Race continues to be driven by a team of passionate, motivated, and innovative auto enthusiasts who share a commitment to the continued advancements in automotive/turbocharger engineering. Full Race is dedicated to providing exceptional equipment with unrivaled service, know-how, and information that ensure customer satisfaction and a vehicle’s maximum performance potential. 

Full Race Motorsports can help ensure that you get the right turbo the first time with its customized turbo matching and system integration service. The brand accurately plots operating parameters and never relies on trial and error or guesswork. As the field of turbocharging grows exponentially all across the globe, Full Race’s remains true to its initial mission to deliver unmatched quality, performance, and reliability to market.

Trusted Quality Products

Full Race’s lineup of legendary handmade exhaust manifolds and complete turbo kits includes both four- and six-cylinder applications for a number of different makes and models. This includes Honda, Acura, Nissan, Volkswagen, Audi, Lexus, Toyota, Mitsubishi, Ford, Subaru, and Porsche. According to Full Race Motorsports, “high performance turbocharging is ‘the replacement for displacement.’” All Full Race turbo parts are proven over and over again for Time-Attack champions, at Formula Drift podiums, and among the winners at your local dragstrip. The company’s quality work has been featured at SEMA’s Ford booth, on Chip Foose’s EcoBoost Mustang, and Vaughn Gittin’s Funhaver F-150 EcoBoost, along with several other iconic builds throughout the years. 

Find Full Race Parts at Vivid Racing

If you are in the market to upgrade your vehicle’s power output and performance, look no further than Full Race Motorsports. Vivid Racing carries a wide array of Full Race products, including brake lines, catbacks, catch cans, downpipes, air intakes, performance turbos, headers, intercoolers, throttle bodies, power packages, and much more! If you have any questions about the items listed above or have fitment concerns, please do not hesitate to contact Vivid Racing’s specialized sales team at (480) 966-3040. We are here to make the purchase process a pleasant and seamless experience for all of our customers.

Full-Race Product Line Warranty
  • All FRM products are backed by a one (1) Year Limited Warranty.
  • The one (1) Year Limited Warranty covers all manufacture defects.
  • Any modification to the Full-Race product voids the one (1) Year Limited Warranty.
  • The one (1) Year Limited Warranty does not cover abuse, accidents, coating, fire damage, crash damage, improper installation, improper component fitment, etc.
  • There are no other warranties stated or implied that extend beyond that described above or warrant fitness for particular purpose other than stated for a given item. Please contact FRM or your dealer concerning warranty claims.

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