I'm talking about the regular dual exhaust those cars came with, not the chambered exhaust. I was looking at the exhaust section in a Classic Industries catalog which have pictures of how the exhaust goes together and I noticed that the regular dual exhaust is just 2 separate pipes going into 1 muffler with 2 inlets and 2 outlets, like our mufflers except with another pipe going into the muffler to make it "dual" unlike our single. Now, I know the optionable chambered exhaust was really dual exhaust but I'm not thinking what I described can be considered "real" dual exhaust or that great for flow. What do you think??

 

Depends how well the muffler can flow...
I think new X5's are that way, except with cats...

 

BTTT