Supertech valve protection.Newly redesigned and now fully CNC machined for a higher quality and finer finish.Fits: BMW S50 B30 EURO VERSION / E36 M3 3.0LReferences: Triple grooveSupertech valve locks.Newly redesigned and now fully machined on CNC for higher quality and more accurate finish.Fits: BMW S50 B30 EURO VERSION / E36 M3 3.0LReferences: triple groove