Product review (2 stars): Required modifications to fit.
The product did not fit as delivered.  I have no clue if was an OEM product or not.  I did get it to fit by making several modifications to the piece.
1)  The piece had two approximately 1/4" diameter by 1/8"plastic knobs that were not matched with corresponding holes in the hanger bracket.
2)  The piece had a smaller additional knob that positionally matched a hole in the hanger bracket but was too large to fit in the hole.

Fortunately I had a very small file with a sharp edge that I could use to saw these knobs off without damaging the rest of the bracket.

I then found that the plastic tabs that the track piece hung onto the bracket with did not have a sufficient gap to mount properly.  I had to thin the tabs to get them to slide properly on the bracket.

On an overall basis, I do not believe that I did anything to weaken the track piece or shorten its life.  However without that very small file (approximately 1/4" wide at its widest point and approximately 1/8" thick), I don't think that I could have made the unit work (albeit an exacto knife might work).

Edit 2/22/2017  - I am lowering this item rating because the track doesn';t stay in place as well as the original unit and falls out of the bracket.