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  • Headers size

    Anyone can tell me what is the size of the stock headers runners.
    Mine seems bigger than a stock one. Maybe its the Euro version.
    Drevaen


  • #2
    http://www.e30m3performance.com/myth...aders/pg-2.htm
    sigpic

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    • #3
      There are 3 main sizes.

      42/48mm (primary/secondary OD's) ~ Standard
      50/50 ~ Evo 2/320is/non cat
      50/55 ~ Sport Evo (E3)

      HTH,
      Jake Larsen

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