What type of Mechanic would do this work? how much would the part and the labor on 2002 Nissan Altima

What type of Mechanic would do this work? how much would the part and the labor run me. Estimation of course>

Asked by for the 2002 Nissan Altima
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What part , what kind of work , what engine? Complete question with complete details may lead to a complete answer.
Now that one is what i call a QUESTION!!!!