I hit the underside of my front bumper pulling onto a road today. I checked it out when I got home and the little protector plastic piece that goes along the entire underside of the front bumper has the two center-ish bolts missing.

does anyone know what size they are?

 

I reckon you are talking about part # 23 on this diagram (scroll down a ways): https://parts.jaguarreno.com/v-2016-...mponents-front
Part # C2Z3858, dunno what size it is.
If you just want to replace those two bolts with a couple of generic bolts of the same size (and save some money by doing do) your best bet is to remove one of the remaining bolts and take it into a hardware/bolt shop where they can match it.

 

Anyone know what is that slanted black protector called, I need a new one and have searched several times. I know it has been discussed.
Thanks

 

I've seen it as grill-spoiler.
Try this:
https://www.ebay.com/itm/JAGUAR-OEM-...53.m2749.l2649