Some pipes depending on the diameter will always makes some noise on decel. Quick test would be to remove your tool cover and loop the ais rubber lines. That will give you a better idea of how it will sound once the ais has been proper plugged
2008 V-Star Silverado 1100. K&N filter, airbox mod passenger floor boards, all light visors, ISO grips, Cobra slash cut mufflers, Saddleman touring seat/ tourpack. Lots of little extras.