Mike Yoder of Kansas Kustoms did one for me and it`s great!
You gain some power and milage with the split and some more with glasspacks.
California Bill said it is worth 10 hp compared to the stock (stuffed) muffler and exhaus system.
I have two cherry bombs that are a bit loud but sound sweet like a WW2 fighter plane is riding the rear bumper ;-)
I would prefer Smithy's, but it`s hard to get them over here.
Paint the pipes with cheap paint (spray can) and drive around for half an hour.
Place the crossover where the paint is not burned away.
have fun, Frank