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The Supertech conical valve spring kit for BMW N54 engines provides conical springs specified at a 7.25 lbs/mm rate for that application. These springs are identified as replacement valve springs for the N54 family and are intended for use when refreshing or upgrading the engine’s valve spring hardware, offering the listed spring rate and conical configuration called out for that platform.
Supertech BMW N54 Conical Spring Kit - Rate 7.25lbs/mm
