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Thread: #6 lower pulley do i need to change plugs ???

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    Registered User
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    #6 lower pulley do i need to change plugs ???

    are new plugs necessary i just replaced with new motor craft plugs all i have are cold air intake and 93 oct predator tune this lower pulley is all that I'm gonna do as far as performance wise..

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    NGK Tr6 #4177 is what you want, gaped at .36 Their cheap, about $2 each.

    Little colder plug for increased boost, and a tighter gap so you dont get spark blowout from the extra boost

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    They're absolutely required. You'll be blowing the spark out left and right with stock gap plugs inthere, and your factory plugs aren't the right heat range for a 6 lb pulley.

    As sonic said, TR-6's are the best bet to go,and cheap too.

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    Quote Originally Posted by jbooth44
    #6 lower pulley do i need to change plugs ???
    Short Answer: YES

  5. #5
    Sport90's #1
    Name: Matthew

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    Yes...change your plugs and gap them properly

  6. #6
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    so .36 is the proper gap

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    yes tr6's is what I'm putting in tomorrow, just needed the gap size.. someone on here told me the tr6's will be good if i go back to stock so..yes +1

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