B16, B18, B20
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By vtec_gloucester
#57549 JASMA isnt a make of manifold its a qaulity control stamp... so unless the manifold has any other markings or stamps then there is no way to find out.
By rikaro
#59716 those paper doesn't tell you much either, other than saying that it's made for the eg6.

Looks like a Spoon 4-2-1 header to me