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The Ferrea dual valve spring kit for 2001–2006 BMW S54 engines supplies matched dual springs intended for the S54 cylinder head. Offered as a direct-fit spring kit for those model years, the dual-spring design supports valve control demands while replacing factory springs during rebuilds or upgrades. Use the kit where S54 compatibility is required for reliable valve actuation.
Ferrea 01-06 BMW S54 Dual Spring Kit
