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? gap for ngk tr-55ix iridium

This is a discussion on ? gap for ngk tr-55ix iridium within the General Help forums, part of the LSx Technical Help Section category; Need plugs to go with new long tubes and ls6 intake Stock 99ss m6 looks like tr-55ix (iridium) is this ...

  1. #1
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    ? 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
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    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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