Requires "A" & "B" Looms for installation

preventing valve float and improving throttle response

11128008118

Arias Forged Pistons (86

Keep your engine responsive

BMW S63 Valve Spring Kit by Ferrea VI Requires "A" & "B" LoomsThe Ferrea Valve Spring Kit for BMW S63 engines is engineered for superior durability and performance under extreme conditions. This kit replaces BMW part numbers 11340039494, 11340054492, 11347578825, 11347572451, 11347504271, 11347614134, and 11340150843. Factory valve springs can struggle to meet the demands of high boost, aggressive cam profiles, and sustained high RPM, leading to valve float and potential engine failure. Ferrea valve springs are