I got an aftermarket front belly pan as well. Lined up fine. There's a good deal of play available with the mounting holes in most of those undercarriage pieces anyway.
Only noticeable different was the material. The original was a glass-fiber infused PE or PP -- pretty nice stuff. The aftermarket one I got was just cheap plastic. Still covered everything up. Not as rigid, and I imagine probably won't wear as well. But it was a third the price of the original, so I guess if it wears less than three times faster I come out ahead?
