The material I got would be fine for any surface on a motor and I was thinking the same thing already mentioned that the mating surfaces of your manifold are probably good enough no gaskit is needed.
I'm not going to take any chances and go ahead and get some gasket stuff....way I figure it is to go on and spend $3.00 now than have to spend $100 down the road after burning up an engine.....
Laters,
Salty
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