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  1. What spark plugs to use for 800+hp on Hellcat

    SRT Hellcat General Discussions
    Hey All, Getting ready to upgrade upper pulley and change oem spark plugs. My question is what brand is everyone using? What heat range are you using a colder plug? Which brand seems to be the best ngk or brisk? Thanks for input.
  2. spark plugs

    SRT Hellcat Performance
    a friend of mine installed some NGK 6510's in his car after speaking with his tuner. after second guessing him and asking way too many other people, he is nervous that they are the wrong plugs. does anyone here know if they are correct?