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The V-Twin 49-0011 Replica Knucklehead Rocker Box Set is machined from an accurate casting and features a natural cast finish with light polished and highlighted surfaces. This set replicates 1941–1947 rocker boxes and accepts the later lower valve spring cups and covers.
Designed for 1938–1940 Harley-Davidson EL models and 1942–1947 Harley-Davidson FL models, this rocker box set is also accurate for 1937–1940 EL applications with the 1940 EO date code. The front exhaust area and rear exhaust pushrod entry area may require recontouring for an exact fit. The rear exhaust rocker kit and arm seal kit are ordered separately.
Installation requires the V-Twin 14-0451 Knucklehead Rocker Box Seal Kit for installation of the 42-6174 Lower Valve Spring Cup Set Parkerized. Use with the 14-0455 V-Twin Tappet Guide O-Ring as required by the manufacturer.
Features:
- Construction: Machined from an accurate casting
- Finish: Natural cast finish with light polished and highlighted surfaces
- Design: Replica of 1941–1947 rocker boxes
- Compatibility: Accepts later lower valve spring cups and covers
- Fitment: Fits 1938–1940 Harley-Davidson EL and 1942–1947 Harley-Davidson FL models
- Fitment Note: Front exhaust and rear exhaust pushrod entry areas may require recontouring for an exact fit
- Installation Requirement: Requires V-Twin 14-0451 Knucklehead Rocker Box Seal Kit for installation of the 42-6174 Lower Valve Spring Cup Set Parkerized
- Installation Requirement: Required to use with the 14-0455 V-Twin Tappet Guide O-Ring
- Accessory Items: 42-6174 - Lower Valve Spring Cup Set Parkerized, 14-0451 - Knucklehead Rocker Box Seal Kit for 2 Heads, 42-6175 - Lower Valve Spring Cup Set Parkerized, 11-1143 - 1936 Knucklehead Rocker Shaft and Cap Kit
Fitment:
Harley Davidson EL 1938
Harley Davidson EL 1939
Harley Davidson EL 1940
Harley Davidson FL 1942
Harley Davidson FL 1943
Harley Davidson FL 1944
Harley Davidson FL 1945
Harley Davidson FL 1946
Harley Davidson FL 1947
| UOM: SET |
| Country Of Origin: TAIWAN |
| Accessory Items: 42-6174 - Lower Valve Spring Cup Set Parkerized 14-0451 - Knucklehead Rocker Box Seal Kit for 2 Heads 42-6175 - Lower Valve Spring Cup Set Parkerized 11-1143 - 1936 Knucklehead Rocker Shaft and Cap Kit |
| Tech Notes: Requires VT #14-0451 Knucklehead Rocker Box Seal Kit for installation of VT #42-6174 Lower Valve Spring Cup Set Parkerized. Required to use with #14-0455 V-Twin Tappet Guide O-Ring. |
