Have just read Autospeed article on inlet manifild gasket to reduce heat transfer. In essence it indicates positive result. Don't know about others, but I believe Autospeed is unbiased and reliable. So I am considering this for my next mod. Any help in sourcing these gaskets would be welcome. Is thermobloc a brand? Any comments welcome. Approximate price. Late at nite ,so brain not too good, but it seems this might be the go when doing rear plugs, which my car needs soon. Any how to write ups?

Barry makes them for the Magna, he has a thread here (http://www.aussiemagna.com/forums/showthread.php?t=38061&highlight=barry). Best send him a PM.
Whilst I have the full kit fitted to my car I have no idea how much effect the inlet manifold gasket has. However I can say it is very well made.