My biggest reason to have a K/N is the fact that we live and drive dirt roads everyday - I plug a filter up in about three weeks - so for that justification only - I run K/N on the 1ton Dodge, the 60 w/350tbi and the 40 w/350....More power? when they are fresh and clean it increases airflow - on my Taco I always found that the mass airflow sensor got oil on it then picked up dust and finally the engine light came on - pain - but better than buying filters -