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99 Trans am Spark plugs

This is a discussion on 99 Trans am Spark plugs within the Firebird / WS6 forums, part of the Vehicle Specific category; What are the best replacement spark plugs for a LS1 trans am 5.7? The old ones need replaced badly and ...

  1. #1
    Impounded LS1 Trans am's Avatar
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    97 LT1 trans am

    99 Trans am Spark plugs

    What are the best replacement spark plugs for a LS1 trans am 5.7? The old ones need replaced badly and they are NGK PTR5C-13, I was thinking those arn't the right ones, but they might have been.. Any certain brand and anything recommended??

    Thx

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
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    Red Tint Jewelcoat
    2008 Trailblazer SS

    NGK TR55's.

    Or ACDelco.
    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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