As it relates to this topic I'm sure just about every single open-element type air filter assembly will meet the minimum CFM requirements for your engine.
The problems I've seen are NOT related to CFM, they are caused by disrupting the airflow into the carburetor. Every single time w/o exception we've done things to raise the carb closer to the hood then have to move air cleaner lid closer to the carb it has caused some sort of performance issue or loss in ET/MPH at the track.
What throws a monkey wrench into some of that sort of testing is running an open element lid or no lid at all and having issues or it not working as well as something else.
In any case guiding air into the carb can have a major impact on power production and vehicle performance, so it's something to think about when you start adding spacers, taller intakes, combinations of both, etc........Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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