Did you measure it? I only ask because I remember seeing a picture of then side by side to stock and they didn't look much longer, if at all, in the picture.
And fwiw, putting a 2" spacer in allows the suspension to drop that much extra as well; thereby more articulation. Fully compressed length is 2" longer though which prevents the tire from stuffing as far..... however if you're running larger tires you don't want the tires to stuff as far as stock or you'll rub.
Again, nothing against OME. Just want to clarify to those who aren't as suspension literate that spacers actually provide more articulation than stock as well. Not sure if the overall suspension travel is much different either... if the OME provide ~2" more travel downward and have more overall travel range (fully compressed to fully extended), then you'd be able to stuff that tire further than you'll want.
With all that said... I still like the OME. they're well known for combining the proper spring rates and damping ratios for good ride comfort and excellent off road performance.