By Precision Raceworks

B58 Port Injection Kit (Fxx, Gxx)

$899.99 USD - $1,449.99 USD
Shipping calculated at checkout.
SKU: 601-0174
Color: Blue
Injector Flow Rate: 750cc
Regular price $1,199.99 USD
Regular price Sale price $1,199.99 USD

Discount available for Military and First Responders

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Regular price $1,199.99 USD
Regular price Sale price $1,199.99 USD


The Precision Raceworks B58 Port Injection kit with flex fuel compatibility is a necessity to safely and sufficiently support the power levels anyone needing additional fueling. This kit is capable of providing supplemental fueling to all BMW's equipped with the B58 engine (Gen1 and Gen2) (see fitment guide for full details).

The complete kit integrates seamlessly into your car like it left from the factory with it installed; you can barely even see the kit once the car is assembled! This kit includes everything needed to add multi-port injection and is 100% e85 compliant. We include new genuine Bosch Motorsport injectors which are flow matched both static and dynamic. A Detailed certificate of conformance included with each kit giving you all flow data needed for optimal tuning.

Don’t be tricked into thinking all port injection kits are equal, the Precision Raceworks is the only port injection kit currently where all 6 injectors have even fuel distribution for each cylinder. Additionally this kit features 750cc* injectors standard (this flow rate is based on industry injector flow test pressure of 43.5psi) at 72psi these injectors flow 1000cc. What this means is our kit is capable of supporting builds from 400whp up to 1,000whp out of the box.

Simply pick up this kit and pair it with your favorite injector controller!  We have several to choose from:

AIC-1 - The basic injector controller used for years.  This controller is easy to tune, and utilizes batch firing (all injectors fire at the same time)

ReFlex Lite - Simple controller that is similar to the AIC in price, but gives you Seqential fire of your injectors.  This improves fuel trims, fuel pressures are more stable, and each injector will output more fuel each time it fires.

ReFlex Plus - Advanced controller featuring CanBus integration, ability to add an ethanol sensor and integrate a true flex fuel tune, ability to add a fuel pressure sensor, and additional capabilites.

For more product details see the specifications tab

(Aftermarket 2 piece charge pipe required)


*Actual flow rate may vary, as advertised flow rate is common average.

Weight: 3.5lbs

Engine Compatibility: All B58 Gen 1 engines (see fitment guide for full details)

Injector brand: Genuine Bosch Motorsports

Advertised Flow - 750cc: 750cc @ 43.5psi , 1050cc @ 72.5psi 

Advertised Flow - 950cc: 950cc @ 43.5psi, 1226cc @72.5psi

Fuel Compatibility: All known fuels including full E85 compatibility

Flow Matched: 2% or better (250% more accurate than off the shelf injectors)

Connection Type: EV6 (Called US Car Connector) works with AIC and JB4 Controller

Hardware included: Yes full stainless hardware included

Gasket Type: OEM Spec manifold gaskets (commonly found in BMW N54 applications)

Fuel Distribution Pattern: Diagonal equal distribution across all cylinders

Fuel Line: Smooth bore PTFE with stainless braid and nylon braid safe for all fuel types

Vehicle Fitment

  • Bmw 340i 2015 to 2019
  • Bmw 440i 2016 to 2021
  • Bmw 540i 2017 to 2023
  • Bmw 640i 2017 to 2023
  • Bmw 740i 2016 to 2023
  • Bmw 740li 2016 to 2023
  • Bmw 840i 2019 to 2023
  • Bmw M140i 2016 to 2019
  • Bmw M240i 2016 to 2021
  • Bmw M340i 2019 to 2023
  • Bmw M440i 2020 to 2023
  • Bmw X3 M40i 2017 to 2021
  • Bmw X4 M40i 2018 to 2021
  • Bmw X5 Sdrive40i 2018 to 2021
  • Bmw X5 Xdrive40i 2018 to 2021
  • Bmw X6 Xdrive40i 2020 to 2023
  • Bmw X7 Xdrive40i 2018 to 2023
  • Bmw Z4 M40i 2018 to 2023
  • Morgan Plus Six 2020 to 2023
  • Toyota Supra 2020 to 2023