Took the stock air dam off. In all actuality, it was my futile attempt to put on my new Rock Hard 4x4 front bumper, but the air damn,er dam took nearly 1.5 to take off. It was getting nearly dark, and I was beyond frustrated with those plastic screw rivet thingys...I just cut them off. I'll try and finish the rest of the install tomorrow.
You dont need it, besides it looks better with out it.