Supertech valve guards.Newly redesigned and now fully CNC machined for a higher quality and finer finish.Fits: BMW S14 16V / S38 24V / E30 M3 87-91References: Triple grooveSupertech valve locks.Newly redesigned and now fully machined on CNC for higher quality and more accurate finish.Fits: BMW S14 16V / S38 24V / E30 M3 87-91References: triple groove