This is a pair of original intake manifolds made by Top Line parts, back in the 80's.  It is nearly identical to the Treuhaft manifolds in every way, only it doesn't have the logo.  Only 100 pairs of these were made, so they're pretty rare these days.  This set of manifolds has threaded bongs drilled and tapped on both sides, so you can run dual balance tubes, one balance tube, or plug them off and run none.  Set will be shipped with a pair of plugs, a pair of barbed fittings, upper/lower intake gaskets, and mounting studs.  They have been bead blasted and are ready for installation.  Limited quantities do to scarcity.