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  1. 06-11-2009, 07:40 AM #1
    GottaHaveLS1
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    1999 Trans Am M6

    Urgent Spark Plug Question

    I just found out that some of my spark plugs are fried after having a mechanic take a look at my car. I believe I have NKG TR55's on there and he said to get new ones and mess around with the gapping. I'd rather just get it right the first time. What should i set the gapping at? also, what kind of plugs should I get? Its a bolt on stock ls1. thanks guys
    1999 Trans Am M6
    SLP Short Throw, Lid and CAI, Strano Springs, Koni Sport Shocks, BMR STB and SFC, UMI PHB, Pacesetter LT's and ORY, Magnaflow Catback, DMH 3" E-Cutout, LS7 Clutch, Motive 4.10, 160 T-Stat, MSD wires,, 17x9.5 Chrome C6's wrapped in Hankook 275/40/17

    Tuned at Mongillo Motors in New Haven, CT - 303 RWHP and 308 RWTQ
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  2. 06-11-2009, 07:48 AM #2
    JwMonE99
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    96 Z28 M6

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    Stick with the TR55s, they are great plugs.
    Gap them to .40
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  3. 06-11-2009, 07:51 AM #3
    shady milkman
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    blacker than wesleysnipes
    98' trans am

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    worth noting is that TR55s are copper ..so they will not last a long time..so your spark plug change intervals will be dramatically shorter ..i believe 20k between changes
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  4. 06-11-2009, 07:55 AM #4
    GottaHaveLS1
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    i had them put in with my headers about 5000 miles ago! but i've had fuel and tuning issues... but apparently now they are the only problem.
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