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Stem Diameter: 4
13 12 8 1 3 5 9 14 11 7 4 2 6 10
are engineered for extreme horsepower and high-RPM BMW S54 applications
SuperTech delivers top-tier valve spring kits specifically engineered for BMW S58 engines
4x 9mm Head Studs
BMW S58 Valves by Ferrea Options:30.6mm Intake / 29mm Exhaust Stem Diameter: 4Ferrea Competition Plus Valves are recognized for their extreme duty performance and industry leading reliability. Specifically designed for the BMW S58 engine, these valves are crafted from aerospace grade alloys like EV8 Z18, offering superior tensile strength and enhanced durability, making them perfect for high performance applications. Ferrea's two step slow forging process ensures optimal grain flow and minimizes internal stress, delivering
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