Matte black ceramic coated finish. Delivering the best of both worlds, radical custom-bike styling with high quality details, Big Radius reset the bar for aftermarket exhaust systems. Comes with full coverage 2-1/2″ diameter plasma cut heat shields that preserve the ‘new’ look and will virtually eliminate visible blueing. Now featuring our innovative PCX Technology, which integrates chambered high-flow catalysts for a boost in torque while producing the deep throaty growl you want from your V-Twin machine. – PCX (Power Chamber Exhaust) technology – Chambered high-flow catalyst cartridge designed to increase torque – Full coverage heat shields. Vance & Hines innovative PCX Technology: 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 / footpegs and 50% less heat at the collector, to optimize rider comfort over the stock system. Tech-Tip: Pre-2021 USA mufflers on a 2021-up Softail/Touring? The FuelPak FP4 (part number 942227) allows you to disable the 2nd. O2 sensor in the muffler, or in the balance pipe of the cross-over section, without triggering trouble codes. This will enable you to use exhaust mufflers for earlier/US models that are not equipped with an O2 sensor connection.