Can't confirm or deny it, but it seems unlikely to me. Just think, after going through the helix, the air spills into a plenum and then fills eight individual, long runners. Seems to me that any swirl filling effects would be long lost. I wouldn't mind seeing someone do a dyno before and after test just to see what happens, but I personally think there's better things to spend your money on. HP gains are overated 99.9% of the time in advertisements.
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Jeff Chambers
1990 Mustang GT 10.032 Seconds / 137.5 MPH
14-time Street Warrior World Record Setter
CRT Performance
2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH
2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2
"There's nothing boring about a small block automatic shifting gears at 9400 rpm!"
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