I found this site, check it out tornadofuelsaver.com It is a product that swirls the air as it enters the intake. Used on vehicles, I bet they make a 4" that fits the intake on a firecat......
"Yes, I installed this product in my 1973 Buick Skylark, and reduced my 0-60 time from 10 min to 3 seconds. And now I pass emissions every time. What a great product".
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