</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">If you look in the lower part of the air box there is like a tunnel looking thing. I am not really sure what its purpose is, but it looks to me like it cuts down air flow. So that was taken out as well.</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">That thingy is a horn. It's purpose is to spread the intake air over the box to get air to all parts of the filter. On a closed element filter that draws air from the side rather than underneath it, it is "supposed" to help evn out airflow.

Greg