EV2.. The W2 Street dominator looks like a Edelbrock Performer RPM for a 340, but with W2 oval intake ports. Mine is gasket matched to my Heads. Is is a single plane manifold though.
You may have mis-typed: The W-2 Holley Street Dominator is the same as the Holley Strip Dominator, except it's not "air-gapped" because of the water passage.
Besides custom intakes, I can't think of anyone at the moment who made an aluminum dual plane for W-2s. But Mopar did have a cast iron W-2 dual plane for a short time, probably for certain circle track rules.
