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428" Header Size Recommendation

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Old 10-16-2011, 10:55 AM
  #21  
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2" on my 454 making 400rwhp at 3200rpm and 620rwhp at 6400rpm. hoping to be upto 650 soon still on pump gas.
Old 10-16-2011, 04:17 PM
  #22  
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1 7/8




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