Ported heads & new valve guides..
03-31-2015, 07:28 AM
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Ported heads & new valve guides.. I have a set of old patriot ported 318 heads. I bought them used and had them fixed up at a machine shop. They replaced all the valve guides. The new valve guides are not ground down like the ported versions were. Will that affect the flow? Ill be using these with a procharger..
