V-Twin Replica Knucklehead Rocker Box Set for Harley Davidson EL and FL (1938-1947)

Replica early style rocker box set with a natural finish has the shape of 1936-1940 Knuckleheads but will fit 1936-1947 models.

Enhance your vintage Harley Davidson restoration with the V-Twin Replica Knucklehead Rocker Box Set, designed to faithfully replicate the original 1941-1947 rocker boxes. Machined from high-quality casting, these rocker boxes feature a natural cast finish complemented by a light polished and highlighted surface, delivering an authentic appearance for classic motorcycle builds. This set is specifically compatible with Harley Davidson models from 1938 through 1947, including the EL and FL series, ensuring a precise fit for your restoration project. The design includes provisions to accept later lower valve spring cups and covers, making it adaptable for various configurations. The front exhaust area and rear exhaust pushrod entry may require recontouring to achieve an exact fit, providing flexibility during installation. Please note that the rear exhaust rocker kit and arm seal kit are sold separately to complete your assembly.

For proper installation, the set requires the VT #14-0451 Knucklehead Rocker Box Seal Kit and is compatible with the VT #42-6174 Lower Valve Spring Cup Set Parkerized, both of which are necessary for a secure fit and optimal performance. The set also pairs with the #14-0455 V-Twin Tappet Guide O-Ring for proper sealing and operation. Crafted in Taiwan, this rocker box set offers durability and authenticity for your vintage Harley Davidson engine rebuild.

Accessories needed for complete installation include the Lower Valve Spring Cup Set Parkerized (SKU: 42-6174, 42-6175), the Knucklehead Rocker Box Seal Kit for 2 Heads (SKU: 14-0451), and the 1936 Knucklehead Rocker Shaft and Cap Kit (SKU: 11-1143). This comprehensive set provides all essential components for restoring the rocker assembly to original specifications, ensuring your vintage Harley runs smoothly and authentically.

Features:

• Authentic replica of 1941-1947 Harley Davidson rocker boxes

• Machined from accurate casting with natural cast finish

• Light polished and highlighted surface for authentic look

• Compatible with 1938-1947 Harley Davidson EL and FL models

• Accepts later lower valve spring cups and covers

• Front exhaust and rear pushrod areas may be recontoured for precise fit

• Requires installation of VT #14-0451 Knucklehead Rocker Box Seal Kit

• Pairs with Parkerized Lower Valve Spring Cup Sets (SKU: 42-6174, 42-6175)

• Includes components suitable for vintage Harley Davidson engine rebuilds

• Made in Taiwan for durability and quality

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