RK Autowerks B58 Race Manifold Gen 1/ Gen 2 – Billet Port Injection Rail

RK Autowerks B58 Race Manifold – Billet Port Injection Rail

This billet race manifold is designed in-house for high-performance B58 applications. It includes an integrated -8AN ORB fuel rail and supports full port injection. Injectors and a port injection line kit are required and not included.

Key Features

• CNC-machined from 6061 billet aluminum

• Integrated -8AN ORB fuel rail (included)

• Supports Bosch EV14K (Shorty) injectors

• 6 × 1/8″ NPT secondary ports for meth/nitrous

• 3 × 1/8″ NPT auxiliary ports for boost reference or sensors

• OEM oil filter remains accessible

• Available in raw aluminum

Designed for BMW B58 Engines, Including:

Gen 1 Applications:

• 340i / 440i – F30 / F32 (2015–2019)

• M240i – F22 (2016+)

• X3 / X4 M40i – G01 / G02 (2018–2019)

• 540i – G30 (2017–2019)

• 740i – G12 (2016–2019)

Gen 2 Applications:

• M340i / M440i – G20 / G22 (2019+)

• M240i – G42 (2021+)

• Toyota Supra – A90 / A91 (2020+)

• Z4 M40i – G29 (2018+)

• X3 M40i / X4 M40i – G01 / G02 (2019+)

• 540i – G30 / G31 (2020+)

• 740i – G12 (2020+)

• 840i – G14 / G15 / G16 (2020+)

• X5 / X6 / X7 40i – G05 / G06 / G07 (2018+)

Installation & Support

• Direct bolt-on fitment using factory mounting points

• Compatible with OEM gaskets and hardware

• Full access to the oil filter retained

• Installation instructions and support available through our team

Why Choose RK

Each RK manifold is built start to finish in our Fort Worth, TX facility — from CNC machining to final assembly. Trusted in competitive and high-boost builds, this manifold delivers performance, precision, and long-term reliability. No shortcuts. No compromises.