Bougie Champion D-14 (OEM 32300-09 ou la bougie d'allumage n° 4). Convient à toutes les basses compressions 1927-1952 45CI, 1927-1947 61CI, 1927-1948 74CI, 1927-1947 80CI et 1953-1954 Servi-Car. La pièce

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H-D #4; one range colder. M18 X 1.5 threaded. 1/2" (12.7mm) short reach. Used with 24mm spark plug socket. This D14 (H-D #4) is one range colder (runs less hot/removes heat faster) than the standard D16 (H-D #3) spark plug. This D16 is available as MCS 931600. The cooler running proporties make this D14 is better suited for high speed riding; as found in extended highway use. Spark plug is copper-core center electrode and comes with the patented UltrasealT coated shell; to help keep the spark plug corrosion free for a longer period of time