Weird, I have a napa 200* in my truck and have for months and it's been fine. Was the same size as the 190* stant I pulled out.
Don’t know how well it shows up in the picture. But that’s a old stant vs napa stainless steel thermostat. The regular looked exactly the same but wasn’t a shiny. I had to center it in the thermostat mount on the head, where as the stant and cumming just slipped right in and fit nice and tight . I had high hopes for that napa thermostat. I noticed the opening on the top was bigger thought will it should flow better once it opens . But after having two go bad in a short amount of time ... I just switched to a cumming . Time will tell how the Cummings Thermostat holds up.
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