do you have a 335i with the hot climate package (no fog lights)? I have that package and never had a problem with heat. I spray WMI on the track with a stage 2 turbo. ~440 whp. As for sway bars I am not driving at that level to offer any advice. However my engine is still running strong, I get blackstone reports nothing jumping out to get worried about yet.
I am running 245 R 18 RE71Rs probably going to bump up to 255.
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