Quick question. My friend has a 2008 Heritage softail with the same 96 motor as my 2010 Road king. My engine has always shaked pretty hard even with the stock pipes. Since I have added slip ons it still shakes hard about the same. My buddies Heritage is really smooth you can hardly see it shake at all. He has Rush slip ons on his. I am going to the dealer tonight for my 2500 service. Any help would really be appreciated.