I understand your need to "BELIEVE", but it isn't my opinion, its a fact supported by every single scientific study ever done on the effect of filtration on Four stroke engines. All out race cars run filters of various types in order to keep particles out, but would rather have none (ever look in the blower of a top fueler or funny car??) because ANYTHING that restricts airflow restricts the engines ability to reach its top HP. But you really should disabuse yourself of the idea that K&N or any other filter ADDS HP, because it isn't going to happen on this planet in this lifetime.