4.6L NPI To PI

Old Aug 28, 2011 | 06:05 PM
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1998f150wes's Avatar
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From: Edmond, OK
4.6L NPI To PI

i have a 1998 4.6(Romeo) NPI and was wondering what else would need to be done after swapping PI heads and intake also what kind of extra power would i get with port and polish (truck has 192XXX miles)
 
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Old Aug 28, 2011 | 06:23 PM
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From: missing Texas...
port and polish might cost you power if it's done improperly
 
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Old Aug 28, 2011 | 09:58 PM
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From: NEVADA
You can get good results with Npi.
http://www.modularheadshop.com/heads/npiheads.htm
 
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