port matching pi manifold
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Old May 10th, 2007, 12:26 AM   #1
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port matching pi manifold


how much horsepower will you gain if you don't port match the manifold to the npi heads
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Old May 10th, 2007, 12:34 AM   #2
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You can see an upwards of 15 HP by just swaping the NPI intake for a PI!
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Old May 10th, 2007, 10:30 AM   #3
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Re: port matching pi manifold


Originally Posted by slow98gt
how much horsepower will you gain if you don't port match the manifold to the npi heads
If you are refering to the P.I intake on npi heads it will make minimal difference. The air flows around the mismatch with ease. Actuall gasket matching a npi head to a P.I intake would more than likely cause a lose of power without fully worked heads.
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Old May 11th, 2007, 08:27 PM   #4
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i swapped mine 300 bucks
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