There was a fair amount of discussion about these on the 335 Series site. This is an updated ad. You'll note that the ad pastes in the CHI data and then comments that these may not flow as well. There were remarks on the 335 forum that the out of the box flow numbers were more like 285 at .600 lift versus the 322cfm suggested by the chart. If I was CHI, I'd be PO'd that they were using my promotonal data to sell copies of the heads they devleoped.
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