Blowing Exhaust?

[liva2704]

I've got a complete stainless exhaust including decat on my 8v and recently its started to blow from what sounds like near the joinining tube,thing is it only seems to do it when its got hot.
Anyway decided to take the whole thing off yesterday to have a look and what a ball ache,because its one whole section from backbox to cat i had to remove rear bumper and drop rear axle slightly and it was still a nightmare to get off.Checked it for holes or cracked welding,all good.
Bought new downpipe to decat gasket,new joining clamp and used jointing compound tightened it all up started car and it sounded great back to that nice tinging you get from stainless exhausts.
Thing is i took it for a blast and its blowing again.
WHAT THE HELLS GOING ON GUYS?

[stainesy]

Are you sure ya blowing? Could one of the baffles have gone?

[liva2704]

Could be i thought of that but deffinately sounds like its blowing

[Luke1981]

You could really do with getting on a ramp and getting someone to give it a good rev whilst your underneath.

Im sure if you popped into your local garage when they are quiet they would oblige 

[VW BUSH]

is it the flexi at the top of the down pipe.......

[liva2704]

i dont think its the flexi definately sounds like its coming from underneath,guess ill just have to wait for it to stop raining and get in on the ramps again.