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  1. #1
    Branden's Avatar
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    what size drill and tap for wideband

    I yanked my manifold off last night as im going to try and tap it myself, but i have a quick question. I went through Gus' thread to see what drill bit he used and im confused, Gus shows a picture of a 37/64 and a 41/64 but in another thread i am seeing someone use a 15mm all the way through and then a 5/8 only 3/4 of and inch and follow up with an 18mm tap. So what bits and tap do i need for a MTXL wb? Thanks!


  2. #2
    SWGTR's Avatar
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    16.5mm or 21/32

  3. #3
    SWGTR's Avatar
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    Drill through with 15 then only drill 1/2 to 3/4 deap with 16.5 or 21/32

  4. #4
    Branden's Avatar
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    is the thread for the o2 bung 18mm?

  5. #5
    Moderator beerdart's Avatar
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    Yes 18mm x 1.5
    Quote Originally Posted by Branden View Post
    is the thread for the o2 bung 18mm?

  6. #6
    hkss's Avatar
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    Please post pictures when you finish
    I am do it in a few weeks.
    And I have a 2014 Model too.

  7. #7
    Branden's Avatar
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    Quote Originally Posted by beerdart View Post
    Yes 18mm x 1.5
    Quote Originally Posted by Branden View Post
    is the thread for the o2 bung 18mm?

    Beerdart, what do you think is the 21/32 the bit to use or 41/64? Not that im doubting the other guy, i just want to make sure not that it likely matters as there is a .016 in difference from what it looks like.

  8. #8
    Branden's Avatar
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    Quote Originally Posted by hkss View Post
    Please post pictures when you finish
    I am do it in a few weeks.
    And I have a 2014 Model too.
    i will be sure to post when i am done

  9. #9
    Moderator beerdart's Avatar
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    In cast aluminum I would use the 41/64.

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  11. #10
    Marc l's Avatar
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