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  1. #1
    Member
    Join Date
    Jul 2005
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    commerce twp michigan
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    65
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    546

    ? gap for ngk tr-55ix iridium

    Need plugs to go with new long tubes and ls6 intake
    Stock 99ss m6 looks like tr-55ix (iridium) is this what I want for long term use.? If so what gap. I did the search and gaps range from .050 to.060
    which is it (stock heads and cam)

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Location
    Thornton, CO
    Posts
    23,773

    Red Tint Jewelcoat
    2008 Trailblazer SS

    The plugs should be gapped at .055" out of the box.

    Double check that...and leave them there.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

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