Do you need to remap your exhaust if you add slip-on mufflers? Your bike may sound great with new pipes, but are you really getting everything you wanted? An exhaust system is only one part of your engine’s breathing system. One of the most common tech questions we get asked is “Do I need to remap my exhaust if I add slip-on mufflers?” The honest answer, no matter what scare tactics your dealer tries to tell you, is no assuming you don’t make any other changes. The modern Delphi fuel injection system is a very advanced electronic device that can compensate for the slight change in flow as well as changes in altitude and temperature. Many people reading this would probably say the bike is lean from the factory, and while this is true, mufflers will not put your engine in danger. That only answers half of the question though. Consider this an engine is only an air pump. The more air you move through it, the more power you will make. Now, if all you do is add a less restrictive exhaust, you will still be limited on how much air the air pump can move as a result of the restrictive stock intake. That said, a set of slip-on mufflers on your new Harley-Davidson may sound like you are making a lot more power when in reality you are leaving a lot of untapped potential.
