BMW N55 / S55 Valve Spring Kit by Ferrea E60 M5 4mm Bore with a thickness

4mm Bore with a thickness of 0

BMW #11241247175

and they have proven to be a top performer in both street and racing BMW S62 engines

Known for their high-strength forged aluminum alloy construction

BMW N55 / S55 Valve Spring Kit by Ferrea E60 M5 4mm Bore with a thicknessFor BMW N55 and S55 owners seeking high performance valve springs, Ferrea offers an expertly engineered solution designed to eliminate common issues like binding, breakage, and valve floatcritical factors that can compromise engine performance. Ferrea valve springs are specifically crafted for high lift and high RPM applications, providing enhanced stability and reducing load loss. Ferrea springs undergo meticulous heat treatment and stress relief to