Ditto on the N-Fabs. The rust popped up after a single winter, and the actual step surface is miniscule. Fortunately, they were under warranty and returnable. Much happier with my 10-13 Trail steps.
As mentioned before... Buy. It. Now.
I found the listing, and it says 4WD, and the pics show the nice little knob that flips the switch to make those front wheels go.
This thing was a steal at $27,995.
I strongly second this. Mine had multiple rust spots after a very mild Minnesota winter. However, the pleasant surprise was that Amazon completely honored the 5 year finish warranty and provided a full refund on a return after 8 months. I've now got the 2010-13? OEM Trail boards (PT938-89100)...