Hey Joe,
Dime City Cycles has an extension with the sweep. It's 1 1/2" ID X 1 1/2" OD. These headers on there now are single wall, 1 1/2" OD. To mount them to cut down stock headers you have to get inventive.......thinking it was a combo of a length of 1 3/8" OD pipe to go over the stock inner pipe and then a piece of 1 1/2" OD to go over that.......which leaves my muffs with a 1 1/2" ID going over that. I ran it with the stock headers but due to the cut off length of the headers, the sweep interferes with the passenger pegs neccesatating removal......so the old grayed single walls are back on along with the pegs, though nobody wants to ride on the back anyway........
OD, ID, DD, DooDee? I think I got all that info correct.......lol