Correct...

My math was off...mils was to be used.

I decided to order Rally Armor universal mudflaps. I will test mount them with a mild adhesive before permanently riveting in.

I hope it looks better than stock flaps!!

There is a 14 mil product by 3M (12 mil + 2 mill adhesive).

My installler will give it try.

If not, 8 mil with 2 mil adhesive is next