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Discussion Starter #1
I'm getting close to doing a pi swap on mine. I've been thinking about having them ported and polishied with a 5 angle. Is it worth the cost to do it on these heads?
 

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I would ported pi heads flow really well and you would benefit some nice gains. If i had an extra set id port them and then install them on mine
 

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Discussion Starter #6 (Edited)
I had my factory PI heads completely overhauled ported polished, 5 angle, and 1mm over sized stainless valves. I picked up between 25 to 30rwhp.
What did this cost you..ballpark figure?
And doing this to a n/a make that big of a difference with stock cams?
 
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