V6 Exhaust Leak/Rattle...
Done lots of searching but still not certain what my issue is so thought I might try to pick your collective brains!
I have a metallic rattle on cold startup coupled with an exhaust blow which both go after about 5 mins or so of running. The rattle started about 2-3 months ago along with a slight and brief 'pip pip' noise (a really small leak noise, effectively). It's now a little worse in that the metallic rattle is a little bit louder and the leak sounds a bit bigger, ie a bit meatier, but they still both go after the car/exhaust gets warm. It doesn't do it while stationary, however, so I haven't been able to get under and have a listen.
I was thinking it sounded like one of those wire mesh o-rings having partly rotted away and left a leak and loose bolts but, tbh, I don't even know if the Alfa has them! A couple of my search results suggested it's possible it's the manifold and I had a further thought the fact that it only really happens when moving might suggest it's a leak in the flexi pipe as it's opening as the engine tilts over a bit...
Anyone any experience of similar? Any help much appreciated.