Sail panels are the pieces that come between the quarter window and the rear window. Like the headliner, these panels are wrapped with thin fabric. And just like with your headliner, it's not uncommon for classic Mustangs to have rips, tears, and sags.

But replacement sail panels are available in the same great range of interior colors that the Mustang came in. This is one of those small details that really makes an interior restoration look great.

Installing your new sail panels is easy. For models that have a light fixture, the hole will be precut, and the clip retainers will be in their original locations. You may have to replace the clips, depending on the condition of the original. Most people are able to install both sail panels in less than an hour.

Considering how inexpensive sail panels are and how easy they are to install, this is an easy interior upgrade to make.