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Anyone Running No 7 plugs ?

My car's about due a new set of plugs, and I was wondering about going to a slightly colder plug seeing as it's tuned a bit.

Anyone tried running 7 grade plugs (Thinking NGK BPR7EIX-11 Iridium).

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    I'm on a mildly tuned car and run NGK BKR6EIX-11 IRIDIUM's.

    Seem to do the job nicely!!!

    Noticable difference;)

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    Hello Mate,

     

    Do a search for a post I did a while ago!!

     

    The only plugs for a tuned Z are PFR6B-11B!!

     

    Mark

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    i have gone to Trust plugs.. work out to something like PFR 7-11Cas the equivalent. i had 11bs in car and they would burn, changed to 11 c problem gone. when i redid engine recently they put stock plugs back in and they burnt. have changed them myself again.

    SVI can supply you any heat range pulg you want i think.

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