These 18mm spark plugs are D-16 type.
VT No: 32-7546
These 18mm spark plugs are D-16 type.
Fits:
WL 1929-1952
EL 1936-1940
UL 1937-1947
FL 1941-1947
UOM: 6 - PK
Country of Origin: Imported
Manufacturer: Champion
2018 Catalog pages: 681
2017 Catalog Page: 683
V-Twin Manufacturing Part Number: 32-7546
Manufacturer: Champion
Manufacturer Part Number: 516
Harley-Davidson & Indian OEM Cross Reference Part Numbers:
Tags: V-Twin, Harley Davidson, Classic Pre-1984, Electrical, Spark Plug, Spark Plugs