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Print in friendly format Send this term to a friend  RPO
Regular Production Order. These are the codes that GM uses to identify options.

For example, LT1 is the RPO for the engine used from 1992-1996.
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Re: Anyone have source for stock & ported 113 head #s? (pics added)

Subject: Re: Anyone have source for stock & ported 113 head #s? (pics added)
by Schrade on 2008/9/5 7:29:38

Quote:

$1250 for headwork? For just increasing air flow? Does it really increase airflow THAT much? You HAVE TO get a cam too dontcha'???

Seems like a wire wheel would open up the ports a little for less than $1250, along with some valve grinding compound...

If you ain't stagin' lights, or oval trackin', $1250 seems a little excessive.
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