@Ked0607
has the gen2 full dual titanium Yoshimura on his gen3.
He said the catalyst are in the ends of the x-pipe, but have been removed.
I have no experience with them, but from Yoshimura's drawing, the catalysts are pushed into the ends of the pipes, vs a typical muffler sized or shaped catalytic converter, so with the catalysts removed, you just have unobstructed pipes, vs a big empty shell of a gutted converter, which loses back pressure, and doesn't sound too good either.