Stuck your head up too high Mitchell? ;)
Seriously, the Dansk "Rallye" muffler I have with a single outlet and twin capped exits is excellent. The two caps come off in 5 seconds with quick release pins and you have instant aural satisfaction. No electrics/cables and period correct.
Technical point: I am on webers, your MFI likes/needs a little back pressure - playing with exhausts has a direct correlation with MFI tuning...