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 chromium-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. AC U-GR SPK PLUG 80-99 BT
