Schrick Valve Spring/Retainer Kit - E46 M3, MZ3, Z4M
Springs & Retainer kit required with some Schrick cams
New set of double valve springs and retainers to go with aggressive Schrick cams on S54 engines used in E46 M3, MZ3, and E85/E86 Z4M models.
24 x 041502095, inner & outer valve spring
24 x 041513011, upper retainer (Titanium)
24 x 041513012, lower spring seat (steel)
The Schrick S54 springs are a dual-spring design, using an inner and outer spring. The main reason for new springs is to use a stiffer spring and prevent valve-piston contact with the extra lift from these cams. The dual design has the additional benefit of controlling spring behavior and frequency, especially at high RPM, as well as providing a fallback in the unlikely occurrence of a broken spring (prevents the valve from dropping or floating). Top retainers are made from Titanium.
E46 (01-06) > M3
Z3 (01-02) > MZ3
E85 / E86 (06-08) > Z4M