Great choice on the pipes. I just put them on my '02 Ultra. I noticed a definite power increase. My suggestion is to speak with your mechanic to see what his plan is for upgrading your ECM. I am assuming that you are fuel injected. Are you changing your air cleaner? Your mechanic should be able to tell you what changes will be made. Ask him if a competition freeflow baffle would require additional modifications to the ECM or would it be the same ECM Flash as the standard baffle. Good Luck