Rk Autowerks S58 Race Manifold – Billet Port Injection

🏁 RK Autowerks S58 Race Manifold – Billet Port Injection

The RK Autowerks S58 Race Manifold is engineered for serious power. Designed, CNC-machined, and assembled in-house in Fort Worth, Texas, this billet aluminum manifold delivers the airflow, fuel control, and reliability demanded by high-boost and competition-level S58 builds.

Built to support port injection for added fueling capacity, this manifold is the go-to upgrade for tuners and racers pushing the limits of the BMW G80 M3, G82 M4, G87 M2, and F97/F98 X3M & X4M platforms. It combines precision craftsmanship, maximum strength, and race-proven performance—everything you expect from RK.

🔥 Key Features

• CNC-machined from 6061 billet aluminum for superior durability and heat resistance

• Integrated -8AN ORB fuel rail (included) for clean and efficient fuel delivery

• Compatible with Bosch EV14K (Shorty) injectors

• Six (6) 1/8″ NPT secondary ports for methanol or nitrous injection

• Three (3) 1/8″ NPT auxiliary ports for sensors or boost reference

• Retains OEM oil filter access for easy maintenance

• Uses factory gasket and hardware for a perfect fit

• Available in raw aluminum or thermal black anodized finish

⚙️ Designed for BMW S58 Engines

• BMW M2 – G87 (2021+)

• BMW M3 – G80 (2020+)

• BMW M4 – G82 / G83 (2020+)

• BMW X3M / X4M – F97 / F98 (2019+)

This race manifold is built specifically for S58-powered BMW models, ensuring perfect compatibility, OEM fitment, and improved flow characteristics across all power levels.

🔧 Installation & Support

The RK S58 Race Manifold is a direct bolt-on upgrade using factory mounting points. It provides full clearance for service areas and integrates seamlessly with existing engine components. Installation support and technical guidance are available directly from the RK team to ensure a smooth setup process.

🏆 Why Choose RK Autowerks

Each RK billet manifold is designed, machined, and assembled in-house—never outsourced. Trusted by top tuners and proven on record-setting BMW builds worldwide, RK manifolds are engineered for strength, performance, and precision fitment. When you choose RK, you’re choosing American-built performance trusted in the most demanding applications.

The items installed or applied to vehicles are intended strictly foroff-road use onlyandtrack vehicles. These modifications may not comply with emissions, safety, or environmental regulations required for public road use underEnvironmental Regulatory Agency (ERA)laws. It is the sole responsibility of the vehicle owner or operator to ensure adherence to all applicable local, state, and federal regulations. Use on public roads may result in legal penalties or vehicle impoundment. Always verify compliance with local authorities before installation.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

If you're unsure whether a part will fit your vehicle, feel free tocontact us herewith your inquiry. Our helpful sales team will reach out to confirm if it's the right match for you.

We offer a flat-rate shipping fee across thecontinental United States. This excludes Alaska, Hawaii, and U.S. territories. For international orders, additional shipping costs will apply. Please contact us for a quote if you are outside the continental U.S.

Also, feel free to also contact us at ColoradoN5X@Gmail.Com for any other questions.

Not all items are covered by warranty. Items including warranty, will clearly state that there is warranty within the product description. Most of these items will be a standard 1-year warranty against manufacture defects. You, the customer, will be responsible for shipping and handling. We will fix/replace that item with a product that is in working condition if you meet the warranty criteria. Please note that you will be allowed ONLY 1 claim within the year for that product. ColoradoN5X is not responsible for any damage caused during the installation of our products.