The low deck Dominator flange his some minor drawbacks that can easily be rectified.The runner dividers need to be cut back and a 2" riser added and it will work quite well.The 4150 flanged manifold works well with a 2"4500 adapter and usually shows about a 10 to 15 hp gain on a dyno.Modifying the Dominator flange manifold will gain you the same if not more.