The one on MSD website looks identical to the one I have just put in. My problem is that when I get up to highway speed you can watch the temp gauge go down to cold, its that quick, have put in 3 stats just in case, flushed the cooling system twice, tested the head gasket, bled the system of air 4 times, checked the water pump and it still does it. Going to set fire to it on Saturday !!!!!