Brushed 304 stainless steel with a ''works'' finish. Comes with PCX™ Chambered High-Flow catalyst cartridge. Developed exclusively for the Milwaukee-Eight Softail platform; the Vance & Hines Stainless 2-1 Hi-Output features the signature Hi-Output stepped 4.5" diameter muffler. Exhaust is constructed from hand TIG-welded high-grade stainless steel and will give your M8 the aggressive stance to let everyone know you mean business. Comes with the Vance & Hines PCX™ technology with a chambered high-flow catalyst; allowing more torque and produces a hard-charging exhaust note that will get your blood pumping as you rip through the gears.- PCX™ (Power Chamber Exhaust) technology - Chambered high-flow catalyst cartridge designed to increase torque - Lightweight high grade 304 stainless steel construction - Hand TIG welded - 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 compr