ROOT CAUSE ANALYSIS

Marsoni

M251S

$199.00

Get it in 3 business days with 1 day shipping. Friday, May 29

ROOT CAUSE ANALYSISDescription MEASUREMENTS The Root Cause Analysis is a high density acetate frame, which means its created from the good, expensive stuff. The time tested aviator shape originates back to a date of which the Internets is just not letting up that easilybut trust us when we say, timeless. Sidebar: Given the amount of hater comments regarding the words engraved across the tops of some of our frames, weve gone underground. We now communicate in Morse Code.

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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Got this to replace cabin air filter on 2020 Honda Civic Sport, as it said it was a direct fit… It does fit but not perfectly! Holding it next to the filter you can see the size difference, with the original being slightly longer. I noticed a whistling sound from the AC at full blast right after install. I believe this noise is caused by the small gap left in the retainer box with the slightly smaller filter. Luckily it is not incredibly loud, but it’s still there. The quality of filtration seems to be much better than stock filter, but the fitment not exact for vehicles mentioned above.

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Reviewed in the United States on May 17, 2026