Hello! Do anyone of you use NGK IRIDIUM IX Spark Plugs CR9EIX ?? Or what are the best spark plugs for daytona ?
Ive got the ngk iridiums in and find them good, but yes there are other brands out there think denso are a good brand.......ive only used ngk would like to know if there is much if any difference between brands
i got ngk iridiums IX cr9eix but the rotation is jumping only on 5000-6000 with stable gas can that plugs cause this ?
