Your v-twin motorcycle is corked  by the factory exhaust in order to meet emissions standards. Installing an aftermarket cruiser exhaust lets your bike's engine breathe better in addition to emitting a true v-twin rumble. A cruiser slip-on exhaust replaces the original muffler, leaving the headers intact. It's a simpler install compared to a full system and adjusting your fuel map isn't usually required. Upgrading your cruiser motorcycle exhaust makes you a bit more conspicuous when riding. It's tough to ignore the unmistakable roar of a v-twin. Just keep in mind that attention from your local law enforcement officer may not be as desired.