RK Autowerks B58 Manifold Gen2 – Billet Port Injection

DescriptionDesigned, machined, and welded entirely in-house at our shop in Fort Worth, TX, this billet manifold is engineered for high-performance Gen 2 B58 applications. With an upgraded intercooler core and support for port injection, it’s built for enthusiasts pushing well beyond stock power levels.Fuel rail included. Injectors and a port injection line kit are required and not included.Key Features:70% larger intercooler core (Wagner Tuning) for improved thermal efficiencyThermal (phenolic) spacer to reduce heat soak between engine and manifoldIntegrated -8AN ORB fuel rail (included)Supports EV14K Body (Bosch Shorty) injectors6 x 1/8″ NPT secondary ports for meth/nitrous3 x 1/8″ NPT auxiliary ports for accessories (e.g., boost reference)Coolant return line with OE fitting includedOEM oil filter remains fully accessibleDesigned 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 & SupportThis manifold is designed for plug-and-play fitment using OEM mounting points. Please note that if you are not using port injection, you will need to purchase blanks. Precision Raceworks sells the blanks very cheap.Why Choose RKEvery RK billet manifold is built entirely in-house — not outsourced or mass-produced. From CNC machining to welding and quality control, we oversee every step to ensure your manifold meets the highest standards of fit, finish, and performance. This is the same design trusted on record-setting builds and proven under extreme conditions, both on the street and at the track. When you choose RK, you’re choosing uncompromising quality, real-world performance, and a brand that backs it up.Click Here For Warranty Info