B46 Cylinder Head Service by 5150 AutoSport

Price is based on the customer providing a cylinder head core. If you need help sourcing a core, please contact our sales team. The BMW B46 engine responds exceptionally well to valvetrain and airflow improvements—and 5150 AutoSport's Pro-Xtreme Cylinder Head Service is designed to extract every ounce of potential. Built for high-performance street, track, and race applications, this service includes precision CNC porting, high-performance valvetrain upgrades, and meticulous machining using state-of-the-art 5-axis equipment. Whether you're pushing more boost or chasing higher RPM, this service provides the consistent flow, improved sealing, and upgraded durability needed to support power reliably. Every head is fully assembled, pressure-tested, cleaned, and delivered ready for installation by your engine builder. Service Includes: Disassembly, Cleaning & Inspection The head is completely disassembled, pressure tested, and inspected for cracks, warping, or other damage. Carbon build