Serious BMW Builds Start Here.

We’re excited to announce the launch of the 5150 AutoSport Engine Shop — your new go-to machine shop for all BMW performance services.

Our in-house services cover every stage of your build, including engine sleeving, block modifications, complete cylinder head machining and assembly, short block machining and assembly, and full long block engine builds. Every engine is handled by BMW experts who understand the demands of high-performance applications.

5150 Engine Shop

Performance Cylinder Head Services

5150 Performance Cylinder Head Services utilize advanced 5-axis CNC machining to optimize port volume, airflow, and surface precision for maximum uniformity. By integrating multi-angle valve jobs and high-performance valvetrain components, this service delivers a fully assembled head that increases power and throttle response while ensuring lasting durability.

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5150 Engine Shop

Short Block Assembly Services

5150's Short Block Assembly Services utilize professional machining and strict measurement standards to ensure maximum reliability. Each build includes comprehensive services such as cylinder honing, line honing of main journals, and precision balancing of the rotating assembly to deliver the consistency required for forced induction and racing applications.

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5150 Engine Shop

Engine Modifications

From Engine Sleeving to Oversized Head Stud Installation to Fire Ringing, 5150 offers a range of engine modification services.

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From precision machining to final assembly, the 5150 team delivers the highest quality engine building services.

Power Meets Reliability: Arias Pistons for BMW

Established in 1969, Arias has a 55+ year legacy of engineering top-tier, high-quality pistons at competitive prices. Manufactured in the renowned CP-Carrillo facility in Irvine, CA, these forged piston sets represent the pinnacle of precision engineering and cutting-edge manufacturing technology.