On Jan 25, 7:41*pm, " wrote:
On Jan 25, 6:58*pm, "Maxwell" #$$9#@%%%.^^^ wrote:

They appear to have a larger cooling area, and are designed for cooling high
output VWs.

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Actually, they've got less. *As in, a LOT LESS. *Measure them. *Then
measure a stock head. *Surprise! :-)
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There's bags of information out there about these heads, from their
inception to their ultimate use on the drag strip. But when someone
who has failed to do any basic research on a topic then fails to
provide a valid email address, it forces others to take the time to
repeat what has already appeared. Personally, I've stopped trying to
help such people, having taken on a more than full-time load trying to
come up to date on my cancer situation. If they are too important --
or whatever -- to use a valid email address, I'm too important -- or
whatever -- to waste my time on them. And being a parrot IS a waste.

-R.S.Hoover