Awesome sound, haven't had it out on the road yet but will put them thru their paces tomorrow -- can't wait! Ditched the cats for the time being. I would have had it ready days ago but had to fab two 16" lengths of 2" tube to go from the ends of the downtubes to my stock resonator inlets. It was a bit more involved than I thought and getting the lengths spot-on was critical to get everything to line up properly. I'll post some more pic's tomorrow & report back on what they do for performance. The Hartge setup has a bunge for the O2 sensor so I transferred it over & so far it hasn't thrown a bad CEL code, still flashes a 1-4-4-4