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Message: <blockquote data-quote="96gt226410" data-source="post: 105835" data-attributes="member: 8765"><p>There is a company that does great port and polish jobs for NPI heads. I can't remember the name, but I'm sure someone on here does. NPI heads that are ported well flow great however the cost to port and polish heads is around $1,000 after labor and hardware. You can get a set of PI heads for around $500 or cheaper. If you have some extra cash, port and polish those heads instead. The cheapest way to make good power is just to swap the PI intake manifold and PI (or aftermarket) cams. I'm doing the whole PI swap myself. My car has 100,000 miles on it and the heads aren't in the best shape...</p></blockquote><p></p>