AirAid's "4 +1" filter construction out-performs the others in clean air testing. Our competitors' airflow gains come at the expense of inferior filtration. 

AirAid provides the optimum balance between maximum filtration and maximum airflow by utilizing 5 layers. The Fifth and "last layer of defense" is a synthetic media assuring the cleanest air possible from any washable filter.

We believe this is the finest air filter you will ever own, and we stand behind it. AirAid's "No Hassle Warranty" is simple: If you are ever dissatisfied with the materials, workmanship or performance of this air filter, just send it back to the manufacturer for replacement. You don't have to worry about a proof of purchase or a warranty card. AIRAID­ filters are warranted for life. Manufacturers warranty - shipping and handling are not included.

Bottom Line: Better filter at a better price!