Product Overview
Replaces Stripped Spark Plug Threads in Aluminum Heads with 14mm Spark Plugs.
Installs a new solid steel spark plug thread insert in original thread location. Set includes one-piece drill tap, long tap holder, short tap holder, insert installer, swedger and handle. Includes four insert sizes: 5/16", 7/16", 11/16" and 1" (new size).
