I finally got the IPR coolant filter with the manifold installed and went for a test drive and ect topped out at 175 and the eot got as high as 209. This was not on level ground but a route I travel a lot. Deltas usually reach 10-12 max before the filter install. The truck is bone stock. I use a scangauge II. Top speed reached was 60 mph. Outside air temp was 72. Any ideas will be appreciated.