The filters arrived on time (delivered within 2 days) and are your main filters only. I installed them on my 2001 Acura TL. The only thing I had trouble with was the flow direction arrows marked on the filters. If you install them according to the arrows on the filters, your filter ends won't catch on the tabs on the ends of the frames and won't let air through. Only when the filters are installed in the opposite direction of the flow arrows do they fit snugly against the petals and ensure a complete seal. So I'm not sure if these are universal filters that fit several different cars and the flow direction works for some and not others, or are they just the wrong direction?
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