A friend of mine is running one of them on his 440 because his M1 intake is too tall and a normal air cleaner won't fit under his hood. He paid extra for the two screens with the 1/4" foam. I was not impressed by the screens and filter. Not very robust. He doesn't even run the filter anymore. The stack and screens seems to flow pretty well, it just made 400 ft lbs on a chassis dyno.
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