Am I correct in understanding that this is not a good idea on a NA that has winter climate? My motor however is EGR'less and i wanted to put one in for that reason, and better performace...

no, its fine, i run my 180* all year long... the heat is fractionally cooler, but not enough to make me wanna switch

Switch it Chris...

Here in MI. it gets pretty cold so a 195 is better in COLD temps IMO,but if you don't
mind a little cooler heater in the winter go for it, won't hurt a thing..

Just drape half of yoru radiator with a towel for winter and you are set.

It got really cold once, so much so that the engine wasnt up to operating temps for 25 minutes, and it probably only rose cus I was at a light. But then I covered half with a towel and it was much better.

So go ahead and switch, and when it gets below 20 degrees use a towel. Sometimes you see semi'* on the road with a vinyl cover over the radiator except for an opening in the center, that you see is the same concept.

I will change it then, what about gas mileage? I see some people say it goes down and others say no difference.......

no noticeable difference

Excellent. One more thing, is this something I can get at the auto parts store? Or do i have to order it? Part number?

i believe that they are available at assorted parts stores

Thank you!