Exhaust blowing- leakage?

[dangerousdferrari]

Thanks for your reply,

The noise can't really be described as a rattling which was being caused with the heatshield. That noise definitly went away when it was stripped, so I'm thinking that's not the problem.
Its hard to describe the noise but its a spluttery 'clicking' that only occurs unders acceleration. When crusing and when idle - even under some harsh revs, the exhaust sounds fine so it seems to only be apparent under the pressure of acceleration.
Further research seems to be pointing me towards the manifold(?) or as you do mention, the Cat.

Can anyone share anymore thoughts on that?

Thanks,

[Gent]

I just went in to a local muffler shop with my 2k because I was concerned about a rattle that only occurred with light throttle at low speed on a rough road (cruising the Stanley Park causeway with cc set at 40 kph in 2nd).

They checked it out, and informed me the same thing that Drem said about the cats. They start playing the Marraccas when they get hot and worn.