So here's an interesting one.. I bought a set of 180 degree thermostats...they are STANT brand. part number 13358... I'm kind of confused.. they came in two different kinds of boxes.. they do not have the rubber housing around them like the stock OEM ones..they just have a rubber gasket ring that you put around the outside edge.. which I guess that part is fine.. but what gets me.. to look at them they do not look the same.. I'm attaching pictures.. personally I had never heard of this brand..but the lady at Nu-Way Auto which is an ACDelco dealer said they've been around forever and are very reliable so I took her word for it... Do any of y'all have any info or opinions.. I did take them out the box and temperature test them in some hot water they don't open till about 195 or so degrees according to my turkey thermometer..do these go in like the normal ones with the big rubber housings or is there anything else I need to know or should I take these back?? any info would be appreciated.. as always I appreciate it guys..