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Message: <blockquote data-quote="Burninrock24" data-source="post: 1151005" data-attributes="member: 18179">Here are the flow numbers:<a href="http://static.trickflow.com/global/images/chartsguides/t/tfs%20airflow%20twisted%20wedge%20185%20ford%204%2C6l.pdf" target="_blank">http://static.trickflow.com/global/images/chartsguides/t/tfs airflow twisted wedge 185 ford 4,6l.pdf</a>Which I got from: <a href="http://www.trickflow.com/partdetail.asp?part=TFS-51910001-M38" target="_blank">http://www.trickflow.com/partdetail.asp?part=TFS-51910001-M38</a>250 @ .500 and 252@ .600 lift. And as you can see from above, those numbers are better than all of the 4V heads except the Y2K Cobra R and the Ford GT/GT500 heads. Which are 7 grand a piece new last time I looked into them haha.They were done at different pressures, but stock for stock they are still touted as the better head. Especially when put on a 2V. Now would it be more cost effective to get ported 4V heads? Maybe. But it depends on how much the new intake manifold will cost and the rest of the swap included. So it's a toss up really.</blockquote>