Best Plugs for 04' STi
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This is a discussion on Best Plugs for 04' STi within the Maintenance, service, and repair forums, part of the Tutorials & DIY category; Stock and no mods, for now. I have always liked NGK, so that's the brand I plan to run unless ...

  1. #1
    Registered User afsniper1207's Avatar
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    Aug 2006
    Poulsbo, WA

    Best Plugs for 04' STi

    Stock and no mods, for now. I have always liked NGK, so that's the brand I plan to run unless somone can convince me otherwise. However, I'm a little confused as to wether to use standard NGK or to spend the little extra and get Iridium or Platinum. Is there a benefit to doing this? When I purchase them, will I have to gap them even though the vehicle is stock.

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  3. #2
    Registered User section9's Avatar
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    Jun 2005
    I'm sure there are a million posts on this subject already. I'm using NGK Iridiums. They last the longest as the iridium is very hard and doesn't melt away like copper and to a lesser extent, platinum. It should come pregapped but I would check anyways. Be careful gapping the iridiums as you can break it off.
    Last edited by section9; 06-03-2007 at 02:26 PM.
    Batmobile: 2002 WRX wagon RIP

  4. #3
    Moderator YBNormal07's Avatar
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    Jul 2003
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    I've always used the OEM plugs. Come pre-gapped and last a while. Stay away from the copper plugs. Good performance but plan on changing them out once every 3 months or so.
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