Kind of a tangent but this seriously isn't easy to do. I spent the last week making my car rattle free and things resonate in such a way that the rattles sound as if they're coming from another part of the car.The shear panel is clearly labeled as vital. The undertray and diffuser, no issues.
I took mine off and drove around to help isolate a rattle.
I took them off to see if they were the source of the rattle. The rattle continued even after removing them. So I continue to look elsewhere.Kind of a tangent but this seriously isn't easy to do. I spent the last week making my car rattle free and things resonate in such a way that the rattles sound as if they're coming from another part of the car.