15-16 INDIAN ROADMAST: Vance & Hines Classic Turn Down Slip-On Exhaust (Chrome / 4") The Turndown Slip-ons feature large 4-inch muffler bodies with the Vance & Hines signature turndown end treatment. Utilizing an all new maintenance-free baffle and also minimizes heat discoloration, the Turndowns give you the perfect blend of the past and the present.Optional quiet insert for baffle which reduces sound levels 3 - 5 dB.Nostalgic styling.4-inch round wi NOT intended for street use.