Originally Posted by phunk

Ouch, that is an oversight on my part. Those mounting points on my car were cut off and filed flush going back 5+ years ago (Greddy oil pan or spacers require it also). I entirely forgot they were there or I would have made mention of this to save you from finding out the hard way and having to back track. My sincere apologies on this, that's a little embarrassing to have missed.

This undertray will still be functional without that bolt, I always ran it even though I had to remove the tab on both sides.