Thread: What size headers for SBC 383
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Old 09-15-2007, 06:45 AM
  #2  
chevguy65
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Join Date: Sep 2005
Location: ID
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With that kind of HP I would think 1 7/8" primaries on full length header would be best.

I have a 460hp engine running 1 5/8" and plan to go to 1 7/8" this winter.
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