I will admit that the higher my temp goes the better the truck performs. I keep mine around 250 or so and I get pretty good performance. I also have the front window cut open for now and I plan on cutting out the side windows as well. My season is almost over here in western NY so its on my to do list. I also installed an hpi savage xl tuned pipe along with the associated header and it lowered my temps as well. The stock muffler is a pos and should be replaced. This is what I've done to keeo my temps in check and should work for you.