I have a '97 vulcan. When it goes under the knife again this spring/summer, it's getting G4 exhaust manifolds and a shiny new y-pipe. I know that G4 and G3 y-pipes end in different spots, so I'll need to grab a G4 exhaust pipe. Would a G4 'tec exhaust bolt up to the same spot, or is it a continuation of the G3 design? Also, did G4 'tecs come with dual exhaust?