Mine were rusty and cracked around the retaining bolt holes, across various areas. These are Toyota OEM parts- and looked and fit just like the originals. Not only do they look good, but I noticed an annoying buzz is gone, likely it was coming from the old cracked heat shields.
When replacing your heat shields, suggest you replace the 6 special bolts too, with Toyota OEM. The new bolts have been redesigned with a lick washer as well as a standard captured washer.