i have a 93 sl2 and was given a 92 4-2-1 exhaust manifold header will it fit and what would i need to do to make it fit.

Yes it will fit. You''ll need the 91/92 downpipe (if it dodnt come with the manifold), 91/92 gasket, 91/92 downpipe hanger and you''ll have to get the catalytic converter welded to the 91/92 downpipe.