BMW M20 Valve Springs by SuperTech Wheel Studs They are designed to replace

They are designed to replace BMW part #11248623419 and #11247589671 for the BMW B58 engines with a 148 mm length

timing drift

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A rigorous 48-hour heat treatment and stress-relief process guarantees the valves' molecular integrity

Included with 20-0547:

BMW M20 Valve Springs by SuperTech Wheel Studs They are designed to replaceSupertechs high performance valve springs for BMW M20 engines (including M20B20, M20B23, M20B25, and M20B27) are designed for serious engine builders and high performance enthusiasts who demand extreme durability at high RPM. Made from Superclean Chrome Silicon Vanadium Steel alloy, these valve springs deliver top tier strength, exceptional structural memory, and extended longevity, even in intense racing conditions. Engineered with computer aided