I'm rebuilding my vg30dett (40p heads) and I'm trying to get the most out of it as possible. I have gasket Matched the upper and lower plenum. Plan on getting MSP manifolds. Stock valves. I'm having heads sent to shop for 3 angle valve job, should I port and polish exhaust ports? Should I gasket Match the lower plenum with the heads? And should I port polish myself or is it really something a shop should do?
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Gasket match lower plenum to heads? - supersh0cker04:07:35 03/13/14