Modification Question
Select this option if the engine has any of the following: The engine has a throttle body or throttle bodies that are different from stock. The stock throttle body or throttle bodies are similar appearance to the stock unit but the butterfly plate(s) have been increased in area. Includes any non-stock throttle body, Mass-Airflow (MAF) sensor, intake plenum, intake manifold or any other non stock airflow-related part between the air-filter housing and the head.

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