Originally Posted by Beemerguru
No one said what year/model bike we're dealing with..Around 1981 with the R80G/S and later airheads, the headers went back to a collector under the tranny before heading to the muffler(s). The headers curved under the tranny which made pulling the head off with the header on about impossible. Some early models had straight back header/mufflers with a single or dual cross over which may be what you meant.
My '83 had dual crossovers. Nothing a sawzall couldn't fix.
Methinks the "collector" came in with the monos. Still nothjing a sawsall can't fix. I notice making that thing go away is a popular GS mod.