I just bought a 15 Road Glide Special. I put some must have accessories on for the wife, (backrest, footboards). I want to get some good sounding pipes and I can't afford true duals at this time. So I have heard from different dealers and some guys around here 2 different schools of thought regarding slip ons. My question, If I want to do just slip ons is that ok, or do I have to at the same time do air kit tuner and map? I would like to go with slip ons for this season and over the winter do air kit tuner map. Any insight would be much appreciated and thanks in advance.