Yes mate, when you put your foot down the engine rocks,and obviously the exhaust is fixed in one position with very little play.
Resulting in banging from exhaust or engine rock !
Had the same problem with a Beemer when a 5 series box was fitted instead of a 3 series, every time I booted it, the box mounts snapped, and the box would hammer against the turret !
If its a heat shield it will sound very tinny and extremely annoying !