Thread: Best header for h22a?
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Old Apr 4, 2005 | 04:10 PM
  #32  
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Originally Posted by RDN
Same thing, he quoted millimeters not inches, its the same give or take .1 or .2 inches
60mm is 2.36". 63.5mm is 2.5".

that's a big difference when it comes to exhaust sizing
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