fits model: Shovelhead. make: Harley, Davidson. year: 1966–1984.

( Brand: S&s Cycle ), ( Manufacturer Part Number: 90-4305 ), ( Part Type: Aluminum Box )
The 1966-1984 Harley-Davidson Shovelhead Rocker Box Kit (Part No: 90-4305) is an essential upgrade for any Shovelhead enthusiast seeking to elevate the performance and appearance of their classic motorcycle. This rocker box kit is a direct replacement for the original parts, ensuring a seamless fit and function in your Harley-Davidson.
Crafted from high-quality materials, the rocker box kit features a durable, polished finish that adds a touch of elegance to your Shovelhead engine. The kit includes all the necessary components, including rocker arms, pushrods, and rocker box covers, for a comprehensive upgrade.
The rocker arms in this kit are designed for improved valve control, leading to smoother engine operation and enhanced power delivery. The pushrods are precision-machined for accurate fitment and longevity, while the rocker box covers are engineered to allow for easy access to the rocker arms for routine maintenance.
Installation of the rocker box kit is straightforward, with clear instructions and illustrations provided. The kit is designed to work with both original and aftermarket valve trains, making it a versatile upgrade option for a wide range of Shovelhead builds.
Investing in the 1966-1984 Harley-Davidson Shovelhead Rocker Box Kit (Part No: 90-4305) is a smart choice for anyone looking to boost the performance and aesthetics of their Shovelhead engine. With its superior quality, easy installation, and compatibility with various valve train configurations, this rocker box kit is a must-have for any serious Shovelhead enthusiast.
Pros of buying a 1966-1984 Cycle 90-4305 rocker box kit for a Harley-Davidson Shovelhead:1. Improved engine performance: The rocker box kit can help improve the engine's performance by reducing valve train wear and increasing valve clearance.
2. Longer lifespan: The kit is made of high-quality materials that can help extend the lifespan of the engine's components.
3. Customization options: The kit can be customized to fit different engine sizes and configurations, allowing for a more personalized ride.
Cons of buying a 1966-1984 Cycle 90-4305 rocker box kit for a Harley-Davidson Shovelhead:1. Cost: The kit can be expensive, and the installation process may require the services of a professional mechanic.
2. Availability: The kit may be difficult to find, especially for older models, which can make it more expensive.
3. Compatibility: The kit may not be compatible with all Shovelhead models, so it's important to verify compatibility before purchasing.
Conclusion:The 1966-1984 Cycle 90-4305 rocker box kit is a worthwhile investment for Harley-Davidson Shovelhead owners looking to improve their engine performance and extend the lifespan of their engine components. However, the high cost and potential compatibility issues may make it a less attractive option for some. It's recommended to carefully research the kit and its compatibility with your specific Shovelhead model before making a purchase. Additionally, considering the installation process and potential cost of professional services, it may be beneficial to weigh the pros and cons to determine if the investment is worth the potential benefits.
Rocker shafts used in thees rocker boxes are a strong and economical straight design. The well thought out design offers a number of advantages over conventional cast rocker boxes. Machined from billet's of 6061 6511 aluminum on modern CBC machining centers, these rocker boxes provide the ultimate in dimensional accuracy and stability.
The top and bottom sections of the covers are sealed with an o ring type seal that insures leak free operation. Features CBC machined from 6061 t6511 aluminum billet and polished to a show finish two piece design allows removal and installation in some frame stop and bottom are sealed with o ring type seal for leak free operation can be used with stock rocker arms IRS roller rocker arms for Shovelhead engine stop end oil can be supplied through stock Shovelhead oil fitting or through push rods when used withes tappet guides and design uses strong economical straight rocker shafts clearance for valve lifts of up. Anyone who has had to replace a set of stock Shovelhead rocker shafts can tell you that this will save you money when it comes time to rebuild the top end.