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Brisk Racing GR14YS Spark Plugs

Dale W

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Is anyone out there currently running these plugs? Have seen numerous articles and account of up to 3-5 HP gain from these. Can anyone verify these kinds of claims and gains? Getting to combine with a 65mm Ford Racing Throttle, 123mm JLT Intake, and Metco 2.60 Pulley on 07 GT500.....Any honest feedback would be appreciated. Thanks.


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