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Message: [QUOTE="lincolnlocker, post: 1170226, member: 944"] this filter is way bigger filter media wise the 2790 has 10.5" diameter and the 6637 has a 8.5" inch diameter.. the 2790 is 11.88 inches long total hight including neck and the 6637 is 12.38 total hight including neck.. the pleats in the 2790 are 2.75" deep and the 6637 are 2" deep... i am guessing there is close to twice the filter media in the 2790.. the cfm rating, which i think means nothing, on the 6637 is 425 and has done just shy of 800hp on a 7.3 on swamps dyno, the cfm on the 2790 is 680... so a third more airflow... live life full throttle [/QUOTE]

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