V-Twin Knucklehead Rocker Box Set for Harley EL 1937-40

Polished finish rocker box set for Harley-Davidson EL engines built between 1937 and 1940. Crafted with new V-twin MFG exclusive tooling, this cast set delivers durability and precision for vintage performance.

The rocker box features machined snap ring grooves to accommodate the seal kit, which is sold separately. Proper installation is essential for maintaining engine performance and ensuring a proper seal, especially for the rear exhaust rocker lower tin on Knucklehead models.

This set is designed specifically for 1937-1940 Harley Davidson EL models and is compatible with various Knucklehead Rocker Box Sets. For optimal sealing and performance, use it in conjunction with the #49-1336 Knucklehead Rocker Box Seal Kit. Manufactured in Taiwan to high manufacturing standards.

Compatible with Parkerized Lower Valve Spring Cup Set (SKU 42-3637) and other Knucklehead Rocker Box Sets (SKU 49-1286, 49-1301, 49-1307) for comprehensive restoration options.

Proper fitment and installation ensure your vintage Harley engine runs smoothly and efficiently, preserving its classic integrity while enhancing durability.

Key features

• Accepts early valve cover cup set with machined snap ring grooves for seal kit
• Cast with V-twin MFG exclusive tooling for durability and precision
• Designed specifically for 1937-1940 Harley Davidson EL models
• Includes compatibility with various Knucklehead Rocker Box Sets
• Made in Taiwan with high manufacturing standards

Knucklehead rocker box set features a polished finish.

Enhance your Harley Davidson EL engine with the V-Twin Knucklehead Rocker Box Set, designed for 1937-1940 models. Crafted with new V-twin MFG exclusive tooling, this cast set features machined snap ring grooves to accommodate the appropriate seal kit, which is sold separately. Proper installation of the rocker box is essential for maintaining engine performance and ensuring a proper seal, especially for the rear exhaust rocker lower tin on Knucklehead models. The set's durable construction guarantees longevity and reliable operation under demanding conditions, making it a vital component for restoration or performance upgrades.

This rocker box set is compatible with specific Harley Davidson EL models from 1937 through 1940. It is recommended to use it in conjunction with the #49-1336 Knucklehead Rocker Box Seal Kit for optimal sealing and performance. The product is manufactured in Taiwan, adhering to high-quality standards.

Included accessory items such as the Parkerized Lower Valve Spring Cup Set (SKU 42-3637) and other Knucklehead Rocker Box Sets (SKU 49-1286, 49-1301, 49-1307) provide comprehensive options for restoration and customization. Proper fitment and installation ensure that your vintage Harley engine runs smoothly and efficiently, preserving its classic integrity while enhancing durability.

Features:

• Accepts early valve cover cup set with machined snap ring grooves for seal kit

• Cast with V-twin MFG exclusive tooling for durability and precision

• Designed specifically for 1937-1940 Harley Davidson EL models

• Includes compatibility with various Knucklehead Rocker Box Sets

• Made in Taiwan with high manufacturing standards

Fitment:
Harley Davidson EL 1937
Harley Davidson EL 1938
Harley Davidson EL 1939
Harley Davidson EL 1940