I believe that those are Stainless Ride/Epco exhaust. They were originally manufactured in Dayton, Ohio but I believe that the Epco owner, an old guy named Tom, sold the designs to Stainless Ride and they manufactured them for a few years before they went out of business,

2006 865 Neon Blue/Jet Black Speedmaster,790cams, TTP Stage 2 Firestarter, Epco Exhaust with 10.25" Samson Vrod baffles, UNI pods with 40 pilots, 150 mains,Thruxton needles, 3 turns out.