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T4 flange tube size

Discussion in 'Turbo Tech Questions' started by Louie L, Sep 15, 2005.

  1. Louie L

    Joined:
    Sep 11, 2005
    Hello,
    New B on the site. I have been lurking for years now.

    Im currently converting a Buick GN stainless aftermarket header from a 3 bolt flange to a T 4 4 bolt flange so i can install a GT42-76. Just wondering what size tube goes inside a T4 flange. Of course after the tube is "squared "off?

    Is it a 2.75 or 3 in.?

    Thanks
     
    Louie L, Sep 15, 2005
    #1

  2. INTMD8

    Joined:
    Mar 3, 2003
    I've squared off 3in to perfectly fit a To4 flange, but it was slightly bowed in towards the flange opening. (slightly, nothing drastic)

    2.75 may remain straight (and not bowed in) after forming it into a square for that flange, but I have not tried it myself so I can't be sure.
     
    INTMD8, Sep 15, 2005
    #2

  3. Louie L

    Joined:
    Sep 11, 2005
    Thanks for the reply, now to hack up a perfectly nice header...
     
    Louie L, Sep 16, 2005
    #3
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