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  1. #16
    Join Date
    Jul 2011
    Posts
    316
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    On a stock motor use the factory heat range. If you change heat range have a way to test the result to know if you are going the right way. The factory can do this better than anyone.



  2. #17
    Join Date
    Jul 2018
    Posts
    5
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    This is an old post, but for new readers Rock has Autolite Iridium XP5263 plugs with a $3 rebate from Autolite. I was planning on using them in my 5.7 Hemi . Can’t beat $0.95 ea. for plugs. My 2007 is all original.

  3. #18
    Join Date
    Apr 2015
    Posts
    167
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    Quote Originally Posted by FlaCharger View Post
    This is an old post, but for new readers Rock has Autolite Iridium XP5263 plugs with a $3 rebate from Autolite. I was planning on using them in my 5.7 Hemi . Can’t beat $0.95 ea. for plugs. My 2007 is all original.
    That sounds a great deal. We'll be working on buddy's '07 RT right after we finished installing the bed cover and headache rack for kayak mount on his truck. I'll check Autolite later.
    2008 Dodge Charger R/T Titanium Metallic
    5.7L HEMI Multi-Displacement V8

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