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Has anyone ever used one of these? Do they work? I have a '78 F150 with a 460 and Holley 650 dbl pumper and am thinking of throwing one of these on there? Just wonder if its worth the $50-$60?
I think they help, but are partially a scam. Not worth the 50 bucks IMO. The flow can only be so good, and the head and intake have more to do with airflow than a spiral thingy on top of the air cleaner.