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The Motortechnic 10-1640 1937 Knucklehead Head Set is designed for Harley-Davidson EL applications from 1937 through 1939. This set uses 1-3/8-inch large-hex, 18 mm spark plugs and includes installed valve seats.
Fitment includes 1937 Harley-Davidson EL, 1938 Harley-Davidson EL, and 1939 Harley-Davidson EL models. Motortechnic recommends using this set with the 49-0878 18 mm Doering Spark Plug Set. Refer to the manufacturer's instructions for installation details.
Features:
- Application: 1937 Knucklehead head set
- Spark Plug Size: Uses 1-3/8-inch large-hex, 18 mm plugs
- Valve Seats: Valve seats are installed
- Fitment: Fits 1937, 1938, and 1939 Harley-Davidson EL models
- Recommended Accessory: Suggested for use with the 49-0878 18 mm Doering Spark Plug Set
- Accessory Items: 49-1348 - 1936 EL Cylinder Head Set Bare, 49-1353 - 1936 EL Knucklehead Cylinder Head Set Black, 49-1349 - Bare 1938-1939 EL Knucklehead Cylinder Head Set, 49-1310 - 1937-1938 EL Knucklehead Bare Cylinder Head Set
Fitment:
Harley Davidson EL 1937
Harley Davidson EL 1938
Harley Davidson EL 1939
| UOM: SET |
| Country Of Origin: GERMANY |
| Accessory Items: 49-1348 - 1936 EL Cylinder Head Set Bare 49-1353 - 1936 EL Knucklehead Cylinder Head Set Black 49-1349 - Bare 1938-1939 EL Knucklehead Cylinder Head Set 49-1310 - 1937-1938 EL Knucklehead Bare Cylinder Head Set |
| Tech Notes: Suggested to use with #49-0878 18mm Doering Spark Plug Set. |
