Originally uploaded by wreckhunter
This looks like an exhaust manifold to me, though we understand the engines from this site were "recovered" a while back. We see with a spot of research that "The engines were removed in 1984 for the "Snowdonia Historic Aviation Group",without the landowners permission. The last large-ish piece of skinning was removed in 1996 by a collector/wreckologist from Cheshire."link.
There are still however fair sized bits scattered all the way down the Cwm from SH 65979 62473. It's rough ground for a 100% recovery.
Location: SH 66000 62282