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The Supertech dual valve spring kit for BMW S54 includes the paired springs required for S54 cylinder heads and ships with SEAT-BMS54 as specified. Supplied as a matched set, it is intended for complete head service or rebuilds where dual springs and the referenced seat component are needed to restore correct valve-train fit and behavior.
Supertech BMW S54 Dual Valve Spring Kit (w/SEAT-BMS54)
