Enthusiast Auto Care, Inc.
EAC Twin Turbo Kit – CARB EO D-873-1 – VQ37VHR 370Z, G37, Q50, Q60 & More (RWD & AWD)
EAC Twin Turbo Kit – CARB EO D-873-1 – VQ37VHR 370Z, G37, Q50, Q60 & More (RWD & AWD)
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EAC Twin Turbo Kit for the 3.7L VQ37VHR (CARB EO D-873-1)
A complete bolt-on twin turbo system for the Nissan 370Z and Infiniti G37, Q50, Q60, Q70, M37, FX37, QX50 and Q40, for both RWD and AWD. The complete kit is exempted under California Air Resources Board Executive Order D-873-1 for street use in California on the vehicles listed below. Earlier order: D-873.
As reviewed by MotorTrend.
📊 At a Glance
- Emissions status: complete kit exempted under CARB EO D-873-1
- Power: around 430 wheel horsepower and 400 ft-lbs of wheel torque, as tested on 91 octane on an otherwise unmodified vehicle
- Response: small-frame turbochargers chosen for early boost, with catalytic converters in place
- Drivetrain: RWD and AWD
- Fuel: 91 octane minimum
- Support: calibration with one year of support
- Parts only: installation labor is not included
🛒 Why Two Prices Are Shown
Most twin turbo kits are priced as hardware only. Fueling, oil cooling, tuning hardware and the calibration are then bought separately, so the advertised price is not what the finished car costs. To make that easy to see, this page shows our kit both ways.
Complete Kit, $12,600. This is the kit we sell. It is the configuration exempted under EO D-873-1, and it includes everything needed to run the car: the turbo hardware plus the oil cooler, oil scavenge system, fuel injectors, fuel pump, engine mounts, EcuTek hardware and license, the EAC calibration, and one hour of dyno time on our Dynojet 224xLC. Every hose and gasket needed for installation is in the box.
Tuner Kit, $8,600. Not available for purchase at this time. This is the price of our turbo hardware by itself (turbochargers, intercooler, custom brackets, adapters and the other essential components), shown so you can compare like for like with hardware-only kits. It leaves out the oil cooler kit, oil scavenge system, fueling parts, engine mounts, EcuTek products, calibration and dyno time. The Tuner Kit is not the configuration exempted under EO D-873-1 and is not covered by the Executive Order.
⚙️ How It Works
Two turbochargers are fitted to the engine, each with its own intake pipe and air filter near the front bumper. Compressed air passes through a front-mounted intercooler and into the intake manifold. Larger fuel injectors and a higher-flow fuel pump supply the added fuel, and the EAC calibration runs the engine. The calibration is locked and cannot be adjusted by the end user.
📈 Results
Expect around 430 wheel horsepower and 400 ft-lbs of wheel torque on 91 octane with catalytic converters in place and no other modifications. The kit uses small-frame R35 GT-R turbochargers (46mm compressor inducer), chosen for early boost and quick response on the street rather than for a peak number.
Results vary from car to car depending on exhaust configuration, drivetrain, fuel quality and how knock-sensitive each engine is. Some vehicles make more and some make less.
📂 More Details
Tap a row to open it.
＋ How it compares with other VQ37 twin turbo kits
| EAC Complete Kit | Kit A | Kit B | Kit C | |
|---|---|---|---|---|
| Price | $12,600 | $8,200 | $12,999–$13,999 | $10,501–$11,030 |
| CARB EO | Yes, D-873-1 | None listed | None listed | None listed |
| Seller's stated legal use | Exempted for street use in California | Not stated | Off-road use only; not legal for sale in California | Off-road and competition use only; not available for sale in California |
| AWD fitment | RWD and AWD | Not stated; 6MT only | Not compatible with AWD | Not stated |
| Fuel injectors and pump | Included | Not listed | Included | Included |
| Oil cooler | Included | Not listed | Optional, +$550 | Not listed |
| Downpipes | Included | Included | Optional, +$949 to $1,195 | Included |
| Calibration and flashing hardware | Included, with one year of support | Not listed | Tuning software not included; retune required | Engine management listed; calibration details not stated |
Compiled October 1, 2026 from each seller's public product listing. Prices and contents change; check the seller's page before relying on this table. "Not listed" and "not stated" mean the listing did not mention it.
＋ Vehicles covered by EO D-873-1
| Vehicle | Model years | Part number |
|---|---|---|
| Nissan 370Z | 2014–2020 | EAC-TT-370Z |
| Infiniti G37 | 2008–2013 | EAC-TT-G37 |
| Infiniti M37 | 2011–2013 | EAC-TT-M37 |
| Infiniti FX37 | 2013 | EAC-TT-FX37 |
| Infiniti Q40 | 2015 | EAC-TT-Q40 |
| Infiniti Q50 | 2014–2015 | EAC-TT-Q50 |
| Infiniti Q60 | 2014–2015 | EAC-TT-Q60 |
| Infiniti Q70 | 2014–2019 | EAC-TT-Q70 |
| Infiniti QX50 | 2015–2017 | EAC-TT-QX50 |
All with the 3.7-liter naturally aspirated engine. For the G37 and M37, the Executive Order excludes certain engine test groups ending in "GAA"; see Exhibit A of the EO.
＋ What is in the Complete Kit
- Twin Nissan R35 GT-R turbochargers, revised by BTW Tuning (compressor 46mm inducer / 60mm exducer; turbine 53mm inducer / 48mm exducer)
- BTW Tuning VQ37 GTR TT Adapter Kit
- Genuine Nissan R35 GT-R recirculation valves and wastegate actuators (8 psi)
- AAM Stage 1 front-mounted intercooler with all-aluminum piping
- Denso R35 GT-R 650cc fuel injectors
- AEM 340 LPH fuel pump
- Omni 4 bar MAP sensor
- Z1 Motorsports 25-row thermostatically controlled engine oil cooler kit
- Turbowerx Exa-Pump oil scavenge system
- Z1 oil pan spacer
- Z1 urethane adjustable engine mounts
- Custom AC line
- EcuTek Bluetooth unit, DESKEY and license
- EAC calibration with one year of support
- One hour of dyno time on our Dynojet 224xLC
＋ Calibration features
- Launch control (6MT only)
- Flat-foot shifting (6MT only)
- PIN-locked anti-theft mode
- Engine coolant overheat protection
- AFR failsafe
📌 Before You Order
Parts only. Installation is available separately at our shop in Concord, CA.
Changes made to the design or operating conditions of the EAC Twin Turbo Kit, as exempted by the California Air Resources Board, that adversely affect the performance of the vehicle's emission control system invalidate the Executive Order.
The Executive Order is not a certification, accreditation, approval or any other type of endorsement by the California Air Resources Board of any claims of Enthusiast Auto Care Inc. concerning anti-pollution benefits or any alleged benefits of the EAC Twin Turbo Kit. It gives no opinion on vehicle warranty or on compliance with any other state, federal or local law.
