Strange rev after cam install

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Apr 23, 2013 | 09:45 PM
  #1  
Hoping someone can help diagnose my new issue. Had a reputable shop (Minicorsa) in Los Angles install my RMW street cam today. Engine revs and feels fine no strange sounds. When I lift off the throttle the engine revs slightly between 200-400rpm.

I'm thinking vacuum leak, any thoughts?
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