With the PCX Power Duals, Vance & Hines brings their proprietary PCX (Power Chamber Exhaust) technology to the line, while also noting customer feedback and repositioning the catalysts further back to aid in rider comfort. You know you can count on Vance & Hines to perform, after all, they did write the book on performance and quality after decades of race experience. Whether it be that extra off the line pull as it transitions to better mid-range torque, or the thundering howl that chases you, you're sure to love these pipes.