Upgrade your BMW B58 Gen 1 with the Precision Raceworks Port Injection Kit for serious power, reliable supplemental fueling and full flex fuel support. This is the go-to BMW B58 port injection kit for M240i, M340i, 440i, 540i, 640i, 740i, 840i, X3 M40i, X4 M40i, X5 40i, X6 40i and X7 40i owners who want safe, consistent fueling on petrol, ethanol blends and 100 percent E85.
We have fitted and used this Precision Raceworks B58 Port Injection kit on customer builds and in-house cars, and it delivers exactly what B58 enthusiasts demand: even fuel distribution across all six cylinders, genuine flow-matched Bosch Motorsport injectors with certification, stealthy OEM-like integration and the headroom to support everything from a tuned stock turbo to big-turbo, high-horsepower setups. If you are pushing your B58 past the limits of direct injection alone, this MPI port injection upgrade is the proven solution.
Why choose the Precision Raceworks BMW B58 Port Injection Kit
- Designed for B58 Gen 1 engines across F and G chassis BMW platforms
- 100 percent E85 compatible for true flex fuel capability
- Genuine Bosch Motorsport injectors flow-matched static and dynamic, with certificate of conformance and Bosch authenticity
- Equal fuel distribution to all cylinders for consistent, safe power under boost
- Supports approximately 400whp to 1,000whp when paired with the right hardware and tuning
- Neat OEM-style fitment that is barely visible once installed
Pair the kit with your preferred controller and you are set. We like the Split Second AIC1-6 Port Injection Controller for B58 applications. The included EV6 connectors also work with popular solutions such as JB4.
Key specifications
- Engine compatibility: BMW B58 Gen 1 only
- Injector brand: Genuine Bosch Motorsport
- Advertised flow - 750cc option: 750cc at 43.5psi, 1050cc at 72.5psi
- Advertised flow - 950cc option: 950cc at 43.5psi, 1226cc at 72.5psi
- Fuel compatibility: All known fuels including full E85
- Flow matched: 2 percent or better
- Connection type: EV6 USCAR works with AIC and JB4 controllers
- Fuel line: Smooth-bore PTFE with stainless braid and nylon braid, safe for all fuel types
- Gasket type: OEM spec manifold gaskets as used in BMW N54 applications
- Fuel distribution pattern: Diagonal equal distribution across all cylinders
- Hardware included: Full stainless hardware
- Weight: 3.5 lbs
Note: Actual injector flow rate may vary. Advertised flow rates are common averages using industry test pressures.
Compatibility - BMW B58 Gen 1
- 1 Series F20 F21 M140i xDrive B58 2016-2019
- 2 Series F22 F23 M240i xDrive B58 2017-2020
- 3 Series F30 F31 F34 340i xDrive B58 2016-2017
- 3 Series G20 G21 M340i xDrive B58 2017+
- 4 Series F32 F33 F36 440i xDrive B58 2016-2017
- 4 Series G22 G23 M440i xDrive B58 2017+
- 5 Series G30 G31 540i xDrive B58 2017-2020
- 6 Series G32 640i xDrive B58 2017-2019
- 7 Series G11 G12 740i xDrive B58 2016-2020
- 8 Series G14 G15 G16 840i xDrive B58 2020
- X3 G01 X3 M40i B58 2017-2020
- X4 G02 X4 M40i B58 2018-2020
- X5 G05 X5 40i xDrive B58 2018-2020
- X6 G06 X6 40i xDrive B58 2019-2020
- X7 G07 X7 40i xDrive B58 2019-2020
Important fitment note: If you have a Toyota Supra A90 or BMW Z4 M40i with the B58TU Gen 2 engine, you need the Precision Raceworks Gen 2 Port Injection Kit due to the different cylinder head design.
Installation and charge pipe requirement
An aftermarket two-piece charge pipe is required. The factory charge pipe will not work with this kit. We recommend the Masata BMW B58 F20 F30 Aluminium Chargepipe for M140i, M240i, 340i and 440i applications.
Real results you can trust
Our team at Nforcd has installed this BMW B58 port injection upgrade many times. It integrates cleanly, tunes predictably and keeps fuel trims stable on high-ethanol blends. Customers love the reliability and drivability, whether running a hybrid turbo or pushing for high horsepower targets where supplemental fueling is essential.
Fitting and support from Nforcd
Based in Warwickshire, we offer professional fitting and support for your B58 MPI kit, along with tuning guidance and complementary hardware advice. Email Sales@nforcd.com for a fitting quote or to discuss your build.
Compatibility check
We verify fitment before dispatch. Provide your UK registration number or the last 7 of your VIN at checkout so we can confirm the correct parts for your vehicle.
Part numbers - choose your configuration
- 601-0175 - 750cc Injector Flow Rate, Black
- 601-0187 - 950cc Injector Flow Rate, Black
- 601-0205 - No Injectors, Black
- 601-0174 - 750cc Injector Flow Rate, Blue
- 601-0186 - 950cc Injector Flow Rate, Blue
- 601-0204 - No Injectors, Blue
Keywords to help you find the right kit
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Manufactured by: Precision Raceworks