Hi, same problems with headers all over, weld them and they crack on another place. I have mine ripped out completely, a new set is beeing fitted in at this moment.
As to the baffles: I took them out last year when we worked on the sidepipes. They look like what I tried to draw below. These things are about 60cm long. We only got them out by opening the sidepipes either on front or, as I did, on the end. There would have never been a chance of them flying out by accident as metal can`t creep around a corner
Noise increased, more gas is needed but h.p. increased too.