:SNSign: well i blown a plug and stripped the threads. what exactly is that part called? and how hard would it be for me to fix it? I got my car towed to the Ford dealership the the dummies trying to get me to pay $1900. $1100 for PARTS & LABOR then 900 for the part that i need which is stripped, which dont make any sense. I have a 01 bullitt mustang and trying to go a cheaper waythen that, so I need to know what it is called and where I can get a cheaper one? and if there is instructions to replacing this part.