A Part fell off of my 2006 Toyota 4Runner. Any idea what it is? It's about 12" x 6". Thanks in advance for any help!

A Part fell off of my 2006 Toyota 4Runner. Any idea what it is? It's about 12" x 6". Thanks in advance for any help!

2nd that; its a catalytic heat shield. Now your catalytic convertor will be able to ignite grass fires when parked more easily.