Why would anyone run without an air filter? The speaker grill idea that has been mentioned in several posts will not keep anything out that matters. Grit will chew up the innards of an engine so fast. We have 5" tall 9" diameter K and N on the 452 in the RR as we have salt, road grit, tan-tan leaves, rocks, small children, Sahara dust etc all in the atmosphere here.



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