K&amp;N 85-2445 Filter Minder; Push in<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Monitors your K&amp;N filter for air flow</li><li>Indicates when the filter should be cleaned</li><li>Easy to read， even after engine is off</li><li>Available with 1/8 In. thread or grommet mount</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41wrUhrVitL.jpg" noproxy>