CalCol

Good point, that was also a consideration for me. I've got the manifold coated inside and out by Jet Hot, and have a heatshield between the two manifolds, but it still gets very hot in there.

Very late to the party on this one, but I did it on my Manta rebuild a few years ago and it's survived the heat and does make a difference (especially the injector clack clack, and damps the noise the electric fan makes). Doesn't look bad (to my eyes) either. I wrote up the rebuild on the forum so you can see how I did it if you want to. This link will take you to page 2 of the write-up and it starts about 7 posts down from there. Cheers, Nick