Edelbrock's Elite series valve cover breathers are made of die-cast aluminum and are polished to a high shine. They have an Allen head bolt-on cover for access to their internal foam filter, and come available either with or without the famous Edelbrock script logo. They also come in your choice of a bolt-on 90 degree side-mount type, a bolt-on 30 degree top-mount style, or a push-in top-mount type. The internal foam filter element won't leak or clog, the way those in other types of breathers on the market can.
