Originally posted by kerrychin:
Would it be safe to assume that if you haven't cleaned your UIM lately (ever) that the EH isn't doing you as much (any) good?
The EH process enlarges the ports and leaves a smooth finish. Howver it is not a slick, polished finish nor would you want one in the manifolds.
Yes the "crud" build up hinders performance. It retains a lot of heat and disrupts the airflow a little.
