Bob Shewman makes high quality 180 degree stats that have high flow openings that don't restrict the flow. A consistent 180 degrees seems to be the best operating range. This gives you warm air in cool weather and at 180 you have a cushion if on a hot day you get in slow traffic. Running at 190 to 200 you have a over heating problem with the stock fans in slow traffic. The 32 to 48 stats fit in the upper hoses and the 49 to 53 stats in the goose neck housings. Bob can be reached at
1-610-933-6637 or
[email protected] G.M.