Thread: RS-R Exmag
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Old Apr 23, 2007 | 03:59 PM
  #34  
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To bolt a header with a 2.5" collector to a stock cat, you need to cut off the stock header flange on the cat and have a 2.5" flange welded on. In addition, you will need a 2.5" donut flange. You don't need a bracket.
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