26. Most race teams operate with a volunteer crew of friends and family. This means that while you may know exactly what your engine settings should be, everyone on your crew may not. Many engine builders, including KT Engine Development, use a decal like this on one of the valve covers providing important information like proper spark timing, valve lash, and firing order, which can come in handy while working on the car in the pits. If your engine builder doesn’t do this, consider making such a label yourself.