So I was driving home earlier and due to a van coming the other way down a country lane at a stupid speed I hit a rather big pothole, or 2

The rim doesn't appear to be damaged and the tracking is still ok, however when I pulled onto my drive something didn't sound right

There was a slight rattling/tapping noise coming from the back of the engine bay, my initial thought was that its the manifold heat shield. However when I revved the engine a little it got worse (as you would expect), but back box was rasping and popping a bit as if the exhaust was blowing somewhere.
I took the car for a drive around the block and sure enough it sounds like the manifold is blowing

Is it possible that hitting the pothole has caused a crack in the manifold? Bearing in mind i'm on hotuning coilivers that are as solid as a rock, so any minor bump in the road is amplified massively anyway.