Hi, is between the middle pot and the cat a separate piece that is mounted only by clamp? At BN I was told that if I had to order their plant, I would have an extra Y-piece that comes between Kats and MSD. Would be with the original exhaust. At the Fox plants it looks as if this Y-piece is directly welded to the MSD. So not separate. As with an S2 plant. If I think back, then I can’t remember that the original plant is a single one. The car is an Audi Coupe 2.8 Quattro. Small question by the way: What lengths do the catalysts of Audi (original) have ?