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making them the ideal choice for high-performance builds
Ferrea valve springs are meticulously heat-treated and stress-relieved to ensure stability in high-lift and high-RPM applications
Chromoly Retainers
Alpina B6 Series
9600 RPM S54 Valvetrain Kit N20 Head Gasket making them the ideal choiceTired of dealing with shim related issues in your BMW S54 engine? Supertech has the perfect solution with this high performance valvetrain kit, designed to eliminate the common risks of OEM valve shim failure, valve float, and coil bind. This upgrade allows you to confidently push your BMW S54 to an incredible 9600 RPM, transforming the performance of your E46 M3 or Z4M. The Supertech valvetrain kit includes high quality engine valves and valve
