Well.... I have a cone in my fenderwell and the cold air tube is a piece of PVC pipe that I bought. I think I have $7.41 invested in it(from memory). Works for me and it got the filter out of the engine bay where the hot air would make the engine surge. I could put a piece of cardboard between the filter and engine and see how much better it idled. CAI.. I say save your money and just go to Lowe's or Home Depot and get the pvc pipe to make one.
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