I'm definitely not the only one on this apparently, after I got mine I was very annoyed at the rattling that would happen when the car was idling, I traced it down to the heat shield and the u-bolt (right term?) had rusted, the shield wasn't in great shape but it was mostly there and I simply replaced the bolt so it wasn't sitting on the exhaust pipe, simple enough solution but sometimes I fear looking underneath my VX b/c I see a lot of rusty looking emissions equipment that soon looks like it will need to be replaced....
cha-ching!