[carmine]

Would like to add to this conversation.
i have experienced the same rattling noise on deceleration from m pipes for many years now.
I also have gone thru all the different fixes mentioned here (screws, high temp silicone, etc) to no avail.
I also went as far as purchasing 3 different sets of side pipes including firefly stainless pipes.
Nothing got rid of the rattling on deceleration.
So my conclusion is that the sound where all hearing has to do with our engines.
Not that there is anything wrong with any of our engines.
Just that there must be something internally similar that is common that is allowing this sound to make its way through the side pipes.
Eg: large overlap cam, cnc ported heads, Distributor set with large initial timing.. etc etc.