The Vance & Hines Super Q Quiet Baffle helps reduce decibels even more than the standard quiet baffle but still emits a deep, velvety rumble. It's the quietest baffle available for the Vance & Hines Big Shots Staggered, Big Shots Longs, Big Shots Duals, Straightshot HS slip-ons, Straightshots, Longshots HS, Softail Duals, Sideshots, and Shortshots Staggered.; Quietest baffle available Maintains deep rumble