U-Groove Spark Plugs - '80-'99 - Harley Davidson

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Accel's state-of-the-art, U-Groove spark plugs with ground electrodes, copper glass inner seal and an electric heat seal to prevent leakage in high-compression engines. Knurled chr omium-nickel alloy side wire for greater durability and greater spark with reduced voltage. Permit the spark to develop a larger, fuller flash for a more complete burn. Pure copper core decreases fouling. Extra-wide heat range. Show more