RK Autowerks Billet Port Injection Intake Manifold, BMW B58 Gen1

RK Autowerks B58 RK Billet Port Injection Race Manifold – GEN1

Precision-engineered for racers and serious B58 engine builders, the RK Autowerks Billet Port Injection Race Manifold offers performance and durability. CNC machined from billet aluminum, this manifold is designed to support high-horsepower builds that demand flawless fuel delivery and superior airflow under extreme conditions.

RK Autowerks is known for their no-compromise engineering, and this manifold is a direct result of meticulous design refinement, race-tested development, and a commitment to quality. Features include optimized internal geometry and increased structural integrity, ensuring consistent performance across the rev range.

Each manifold includes an integrated billet aluminum fuel rail, precision-machined to support aftermarket injectors and ensure balanced fuel distribution across all six cylinders. It’s built to pair seamlessly with your preferred port injection kit and tuning solution. Fuel injectors and port injection kit are not included.

Whether you're chasing horsepower records or building a reliable, track-capable B58 Gen 1, this manifold delivers the engineering excellence and performance that RK Autowerks is trusted for. Perfect for high-boost, methanol, or ethanol-fueled applications where OEM plastic manifolds simply won’t hold up.

BMW B58 Gen 1 Applications:

1 Series

2016-2019     F20/F21     M140i

2 Series

2016-2019     F22/F23     M240i

3 Series

2015-2019     F30/F31     340i / 340i xDrive
2016-2019     F34     340i GT / 340i GT xDrive

4 Series

2016-2020     F32/F33/F36     440i / 440i xDrive

5 Series

2016-2019     G30/G31     540i / 540i xDrive

6 Series

2017-2019     G32     640i GT / 640i GT xDrive

7 Series

2015-2019     G11/G12     740i / 740i xDrive

X3 Series

2017-2019     G01     X3 M40i

X4 Series

2018-2019     G02     X4 M40i

Designed to replace BMW Part #11 61 8 603 913, 11618603913 found in the 2016-2019 BMW F20, F21, F22, F23, F30, F31, F32, F33, F34, F36, G30, G31, G32, G11, G12, G01, G02, G38, M140i, M240i, and M340i, M340ix, 440i, 440ix, 540i, 540ix, 640i, 640ix, 740i, 740ix, 740Li, 740Lix, X3, X4. After placing your purchase, please contact Sales@5150AutoSport.com with your vehicle VIN to verify fitment.