B46 Combustion Chamber Upgrade Service

Please note that pricing is based on the customer providing a core. If you need assistance sourcing a core, contact our sales team. For enthusiasts and builders pushing the limits of BMW’s B46 engine, optimizing the combustion chamber is a critical step toward maximizing performance and reliability. The 5150 Combustion Chamber Upgrade Service reshapes the combustion chambers using state-of-the-art 5-axis CNC equipment for improved flow, consistency, and combustion efficiency—delivering proven gains in power, torque, and responsiveness. All machining is performed on our Rottler 5-Axis CNC platform to ensure precise, repeatable results across all cylinders. This service is ideal for customers integrating performance upgrades such as forged pistons, aftermarket turbos, or high-lift camshafts, ensuring the combustion chamber no longer remains a limiting factor. CNC Combustion Chamber Reshaping Process for B46 Heads 1. 3D Scanning and Digital ModelingEach combustion chamber is digitally sca