I'm in need of a gasket to go from the standard manifold to a ats adaptor block which doesn't have the twin entry.
Currently the metal gasket i have has the raised sealing bump in a figure 8 to seal against a ct26 but I need one with a raised bump in a 0 shape. If I use the one I have I am worried it wont seal in 2 places. The pic should help explain my problem.
If anyone can help me with info on obtaining the correct gasket that would be great. Thanks

the single entry ct26 gasket would be the closest to what your asking for afaik, but it will cut off the corners, the hole isn't as big as you really need.
 
std toyota gasket would be best imho. it doesn't have pronounced raised bumps like that gasket.

What vehicle should I be telling toyota that I want the gasket from then? If it doesn't have the bumps maybe I can cut some of it away

Hmm, it would be from a 7mgte supra, or some landcruiser.

But id personally use the toyota twin entry gasket.

there are different part numbers for that gasket between gen2 and 3, i run a gen 3 manifold, but im just curious if you know the differences?
 

Cant see how. Havent looked any different from the ones ive seen, at a guess its possible the gen3 has slightly bigger ports, but I doubt it.