Somebody explain this? I would thik it would restrict air flow by adding another fliter factor, but it looks like it takes in more air? Anyays, who ever car this is... your page is real nice, 'cept that black evoVIII wing just doenst look right on the red ralli-art.

 

this enlarges the actual area of passage from the filter to IM than having one pipe and one filter. since there are two filters in use, the actual area of filter material increases also reducing restriction. is it better? i don't think so, unless you plan on not cleaning them ever.