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Discussion in '2005 - 2009 Specific Tech' started by 07gtfolife, Mar 20, 2007.

  1. 07gtfolife New Member

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    Whats the deal with the 1 3/4 and 1 5/8? I noticed on brenspeed that the macs are 1 3/4 and the kooks and other such brands are 5/8's. Just wondering.
    07gtfolife, Mar 20, 2007
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  2. bigcat start with the upper hole, and if more traction is

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    different size primary tubes. selection will depend on your particular application. bigger is not always better.
    bigcat, Mar 21, 2007
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  3. anthony05gt New Member

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    The larger diameter tubes are for engines running excessive boost like over 500 rwhp. Otherwise, the larger tubes are for big block engines.
    anthony05gt, Mar 21, 2007
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