Champion 7989 spark plugs are a one piece design that eliminates separating (image courtesy of ModdedMustangs.com).
Summary: In this auto repair blog post, we provide information about an improved design spark plug for Ford 3 valve engines. The original equipment Ford Motorcraft spark plugs have became notorious for breaking when being removed. One of our previous articles is on broken spark plug removal; but who wants to put the same bad design back in? There was a huge need for a newly designed replacement spark plug that would work in place of Ford’s badly designed spark plug that has caused much expense and inconvenience for many Ford owners. This article is about that plug and has application information as well.