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3866948 or Performer RPM Air Gap

I love my Chevy Chevette!
Posts: 5
Joined: 12/10
Posted: 07/09/18 02:57 PM

I was wondering if anyone knows for certain the flow differences between the 360HP factory cast iron Holley BBC intake 3866948 and an Edelbrock RPM Air Gap. I already have the cast iron manifold and was thinking of using it on my next 454 build. I know it weighs more than the aluminum option, but does the aluminum really make any more power?  
Been doing this for too long!

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