Thare are quite a few variations of exhaust for Bajas that still use heater boxes. My last setup was pretty nice because it was still a merged design (not the one thats sorta square across the back) and had a stinger that went straight up and could use the heater boxes and either a stinger, muffler, or glasspack Allthough the latest Empi and bugpack catalogs have really thinned the selection down this year(Empi still has a few choices). S&S I think still has a good selection of them, and I think that Myers was selling the sidewinder type (what I think you are reffeing to) last time I talked with a manx guy. Mark Detro Englewood, FL