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Sparkplug?

This is a discussion on Sparkplug? within the External Engine forums, part of the LSx Technical Help Section category; Would a Autolite ar103 be good for a 2005 Tahoe z71 stock? I will be adding a magnaflow catback, throttle ...

  1. #1
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    Sparkplug?

    Would a Autolite ar103 be good for a 2005 Tahoe z71 stock? I will be adding a magnaflow catback, throttle body spacer, cold air induction and probably a bully dog tuner in the near future as well.

  2. #2
    cutting and welding mark21742's Avatar
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    hugger orange
    2004

    Yup, that is the plug I use and recomend, but I wouldn't waist my money on the tb sppacer

  3. #3
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    Do I use the standard copper plug or the platinum plugs. Also why did you say not the go with the throttle body spacer. I am looking to improve fuel economy and low end power.

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