Iridium NGK spark plugs - Ford Mustang Forums : Mustang Forum
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post #1 of 2 Old 08-09-2002, 03:35 PM Thread Starter
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Question Iridium NGK spark plugs

Hey has anyboby tried the new NGK Iridiums (part #TR5IX) in their
Gen-1 s yet? I just got mine ,I'am wondering if their really worth
the $6.50 a plug that I just gave for them. Any input would be

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post #2 of 2 Old 08-09-2002, 05:46 PM
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i honestly dont see what the benefit would be, maybe a tad better gas milage? surely no noticeable horsepower difference unless your old plugs were toast

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