Unleash your motorcycle''s true identity as a hell-raising fun machine with Vance & Hines Shortshots Staggered. The sharp clean lines of Shortshots Staggered will transform the look of your V-Twin steed; and now features innovative PCX™ Technology with chambered high-flow catalysts; you''ll feel the pull right off the line with increased torque and an aggressive hot rod roar that is gonna turn heads. - PCX™ (Power Chamber Exhaust) Technology - Chambered high-flow catalyst cartridge designed to increase torque - Full coverage heat shields - 49-State Emissions Compliant. Vance & Hines innovative PCX™ Technology explained: More Power & Less Heat. The PCX™ (Power Chamber Exhaust) Technology are factually chambered high-flow catalysts. Used to increase mid-range torque for more responsive acceleration off the line. They are positioned downstream for up to 20% less heat at the floorboards / foot pegs and 50% less heat at the collector; to optimize rider comfort over the stock system. PCX™ technology uses a high-flow double-matrix catalyst that improves torque delivery through the mid-range for more responsive acceleration. All while producing an even deeper full-throated rumble; all with no compromise to the styling of any Vance & Hines exhaust system.