Get the unmistakable signature Vance & Hines end treatment in a slip-on muffler with Twin Slash 3 in. Slip-ons. Available for the Indian Scout and Scout Bobber, Twin Slash 3 in. Slip-ons now also feature our innovative PCX™ Technology, which integrates chambered high-flow catalysts for improved torque across the powerband along with a nice throaty tone whether you're cruising the boulevard or carving the canyons.