RK Autowerks B58 Race Manifold Gen 2 – Billet Port Injection
This billet race manifold is designed in-house for high-performance Gen 2 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 x 1/8″ NPT secondary ports for meth/nitrous
3 x 1/8″ NPT auxiliary ports for boost reference or sensors
OEM oil filter remains accessible
Available in raw aluminum
Designed for BMW B58 Gen 2 Engines, Including:
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.