Ferrea Dual Valve Spring Kit for BMW S54 (01-06)

Ferrea Dual Valve Spring Kit for BMW S54 (2001–2006) Fitment: BMW S54 engines (E46 M3, Z3 M, Z4 M) model years 2001–2006. Designed for OEM replacement and high-performance applications. Overview: The Ferrea Dual Valve Spring Kit provides durable, consistent valve control for high-RPM use. Engineered with precision-wound coils and heat-treated alloy steel, this kit minimizes valve float, improves stability, and supports aggressive cam profiles while maintaining reliable street drivability. High-strength construction — heat-treated, shot-peened springs resist fatigue. Dual-spring design — progressive load characteristics for better control across the rev range. Optimized for high RPM — prevents valve float and coil bind with higher lift cams. Direct fit — engineered to OEM dimensions for straightforward installation. Complete kit — includes inner and outer springs, retainers, and locks where applicable. Ideal for track, race, and modified street engines, Ferrea’s S54 Dual Spring Kit delivers the reliability and performance required to extract maximum power while protecting valvetrain components. Upgrade your S54 for confident high-RPM operation.