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
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CNC-machined from 6061 billet aluminum
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Integrated -8AN ORB fuel rail (included)
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Supports Bosch EV14K (Shorty) injectors
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6 × 1/8″ NPT secondary ports for meth/nitrous
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3 × 1/8″ NPT auxiliary ports for boost reference or sensors
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OEM oil filter remains accessible
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Available in raw aluminum
Designed for BMW B58 Engines, Including:
Gen 1 Applications:
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340i / 440i – F30 / F32 (2015–2019)
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M240i – F22 (2016+)
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X3 / X4 M40i – G01 / G02 (2018–2019)
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540i – G30 (2017–2019)
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740i – G12 (2016–2019)
Gen 2 Applications:
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M340i / M440i – G20 / G22 (2019+)
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M240i – G42 (2021+)
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Toyota Supra – A90 / A91 (2020+)
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Z4 M40i – G29 (2018+)
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X3 M40i / X4 M40i – G01 / G02 (2019+)
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540i – G30 / G31 (2020+)
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740i – G12 (2020+)
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840i – G14 / G15 / G16 (2020+)
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X5 / X6 / X7 40i – G05 / G06 / G07 (2018+)
Installation & Support
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Direct bolt-on fitment using factory mounting points
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Compatible with OEM gaskets and hardware
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Full access to the oil filter retained
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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.














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