drl911 Posted May 5, 2008 Share Posted May 5, 2008 What are the 6 plugged ports for on the bottom side of the stock N47 intake manifold? Thanks, Dan Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted May 5, 2008 Administrators Share Posted May 5, 2008 Probably helped in removing the sand after casting the EGR plenum, and also to drill and access the small ports between the EGR plenum and Intake runners themselves. Quote Link to comment Share on other sites More sharing options...
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