according to dealer who sold me the bike after market head pipe will not void warranty as long as you buy the HD tuner.
What mufflers are you running? If you are running SE muffs with cats then I believe you could still be within Harleys EPA parameters, if not, then no warranty could be void.
Did you get the cam and dyno tune done yet? Let us know the outcome of your heat issue. Like others have said with a good catless headpipe and a quality tune your heat issue should be resolved.
Cam is done and heat at head pipe is much better- new problem - dealer said they couldn't dyno it because the SE mufflers where to restricting, said if I changed the mufflers they would do the dyno then - they said it tuned good though. seemed ok performance wise on the way home but it had just rained. Tired of throwing money at it - but am thinking of the Krome Werks 4.5 inch mufflers. Any thoughts - opinions?