Lisle Deep Hole Alum Head M14x 1.25 Spark Plug Hole

Features & Benefits:

• 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).