Yes I installed mine a week ago. They require 8mm (.315") tall spacers not 1/2" if you want to be precise
. The injector body is 48mm vs the OEM 40mm. I turned a couple of them out of some 5/8" aluminum stock I had lying around. You'll also need to pick up four 25mm long M8 x 1.25 bolts.
Also make sure you take the old injector seals out of the intake manifold, I almost forgot myself. I only thought of this because you said it looked 1/2" high and those seals being in there with the added injector height would look about 1/2"