Hi Slowy
https://www.permatex.com/product-cat...ers/?locale=en
https://www.supercheapauto.com.au/sh...gasket-sealant
Last time I had the manifolds off I made up the exhaust gaskets with the high temp red stuff and just used that for the valley sections of the inlet to replace the cork.
Otherwise I have used the grey stuff in the past for inlet (found the tube had gone off last time).
If you get stuck give me a call.
ta
LoBelly