Replacing the original is err risky, I use the zed everyday and can't afford the risk of breaking them off, if I take it to a garage somewhere there is no reason they won't break them off too, leaving me with a problem. Running this online one has its problems, the M44 and maybe the 6 pot too has a short circuit and long curcuit cooling system, it uses the short while warming up then switches to long to balance the temperature. The problem here is I can't use the thermostat in the long curcuit as it will never get hot enough, if all is working as it should this is not the case as the thermostat is in the engine, my only option is to use it in the short curcuit and see what happens.I may need to add more holes to heat it up quicker the problem I have with the original thermostat is the emissions.