NGK V-Power Spark Plugs for use with AFR cylinder heads, AFR165 and AFR185.V-Power spark plugs are a patented design by NGK to improve ignitability and reduce quenching. Ignitability is improved by the V-groove cut in the center electrode parallel to the ground electrodes; this directs the spark to the edge of the center electrode thus exposing it to more of the air/fuel mixture. Quenching is reduced in much the same manner, drawing the spark to the edge of the center and ground electrodes reduce the surface area available to quench the spark.
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This product will fit the following Ford Mustang years:
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