get outta that Damo 
Get out of what?

With the exception of Torquesport's engine bay, most, if not all, of the engine bays I've seen have been minging.
I'm not 100% sure what's happening with my Astra, as I have said in my thread.
A heat sheild on the exhaust manifold will improve it no end, especially if you do get a stainless one fitted. Part of the problem with the heat sheilds falling apart is the fluctuation in the heat levels they are exposed to.