My father has a 2007 Ultra Classic. His year model should have a 96cc motor but he has a badge that states 103cc and performs better than a 96cc. He just bought the bike from a dealership so we do not have a full history. His question is when looking at a new exhaust system is the head pipe dimensions the same across both the 96cc and the 103cc? He is currently looking at a set of vance and hines true duals. Will this set up work for his motorcycle. Any other suggestions on exhaust systems? I have bragged about this website to him about finding important information. As always thanks for your help.