U-Groove Spark Plugs - 48-74 - Harley Davidson

Fitments Years Make Model 1948 Harley-Davidson FL 1949 - 1957 Harley-Davidson Hydra Glide FL 1958 - 1964 Harley-Davidson Duo Glide FL 1965 - 1974 Harley-Davidson Electra Glide FL 1958 - 1964 Harley-Davidson Duo Glide FLH 1949 - 1957 Harley-Davidson Hydra Glide EL 1971 - 1974 Harley-Davidson 1200 Super Glide FX 1974 Harley-Davidson 1200 Super Glide FXE 1965 - 1974 Harley-Davidson 1200 Electra Glide FLH FeaturesAccel'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 enginesKnurled chromium-nickel alloy side wire for greater durability and greater spark with reduced voltagePermit the spark to develop a larger, fuller flash for a more complete burnPure copper core decreases foulingExtra-wide heat rangeSpecs Spark Gap: 0.025" Center Electrode Type: Standard Electrode Tip Material: Nickel Alloy Ground Electrode Shape: Grooved Product Name: Spark Plug Heat Range: 9 Riding