TwinTurbo.NET: Nissan 300ZX forum - the openings on the manifold are significantly larger than
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Subject the openings on the manifold are significantly larger than
     
Posted by spyhunterTT(nj) on January 14, 2009 at 5:56 PM
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In Reply To are they port and gasket matched already? posted by Carlos Ramirez on January 14, 2009 at 02:32 PM
     
Message both the heads, the stock manifolds, and the exhaust gaskets.

Port matching to the MS manifolds to the heads is NOT a good idea (at least according to the local head guy). Take it too a professional at building race heads. The MS manifolds are gigantic and opening the heads that much won't help performance. I don't recall the reasoning about the extra ridge prevents some kind of back flow

Alex

     
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