RK Autowerks S58 Billet Aluminium Port Fuel Injection (PFI) Intake Manifold with Integrated Charge Cooler & Fuel Rail - BMW M3/M4 (G80 G81 G82 G83) Gen 1 & Gen 2

Billet alloy plenum with integrated charge cooling for BMW M3 and M4

Unlock reliable fueling headroom and cooler charge temps with this premium machined aluminium plenum featuring an integrated charge cooler core and dedicated secondary rail for auxiliary port injection. Crafted in-house by RK Autowerks for absolute precision, this is the go-to upgrade for serious M3 and M4 builds seeking a clean port injection solution and rock-solid intake hardware.

What makes it stand out

• Designed, machined and TIG-welded in-house for uncompromising quality and repeatable performance
• Integrated charge cooler core is 40% larger than the factory S58 manifold core for improved thermal control
• Purpose-built for auxiliary port fueling to extend fueling capacity on high-power setups
• Secondary fuel rail included for a tidy, straightforward PFI installation
• Six 1/8 NPT secondary ports suitable for methanol or nitrous hardware
• Three additional 1/8 NPT take-offs for vacuum or supplementary sensors
• OEM oil filter access retained for hassle-free servicing
• Billet aluminium construction for strength, stability and consistent sealing under boost
• Compatible with early and later S58 variants including G80, G81, G82 and G83 applications

We have installed this assembly on customer M3 and M4 projects and the verdict is unanimous – fit, finish and functionality are first class. If you are chasing dependable auxiliary fueling and a neat charge-cooler-in-manifold solution, this is the one we recommend.

Recommended injectors

Use EV14k Body injectors (Bosch Shorty) for the port injection setup.

Finishes and custom options

• Standard finishes: Unfinished aluminium or gloss black
• Note: Unfinished aluminium is intended for customer powder-coat or polishing. Minor surface marks may be present and will not be visible once finished.
• Custom colour upgrade available for £450
• Typical lead time for custom colours is approximately 3 weeks

To request a custom colour, email your order number and preferred finish to info@mjmodifications.co.uk.

Fitment and installation

Suitable for BMW M3 and BMW M4 models powered by the S58 engine, covering Gen 1 and Gen 2 fitment. Professional installation is recommended. For expert fitting, MJ Modifications in Warwickshire can supply and install this manifold. Request a fitting quote at info@mjmodifications.co.uk.

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