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And as I said...the stock head lfows FINE...there's just not that much power form P&P, or Extrude Honing, or even bigger valves. These tricks work great on old 2-valve heads with SH!TTY intake manifolds...but the KA is pretty good in stock form. I bet you see better gains from a properly desinged intake mani alone than all the P&P and big valves with a stock intake manifold
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My whole idea was redline at 6500rpm with a intake manifold designed for a higher horsepower powerband not the short runner stock intake designed for torque. also with aftermarket cams not s13 cams but jwt's or the new billet cuts that I saw somewhere else.