I cannot comment on the lower CHT temps as I’m not lucky enough to have a gauge but I can say that since I fitted one of these shrouds my carb icing issues seem to have gone away.....6 months and 35hours without a problem. I’m on Vancouver Island in the middle of a wet temporate rain forest with the possibility of high humidity year round. It’s not much fun when the engine coughs at 7000’ over Comox glacier.!
So far, well worth the money....