Description
Proper rocker box sealing is critical to preventing oil leaks and maintaining engine reliability, especially when pairing OEM stock rocker boxes with high-performance S&S cylinder heads. This gasket set eliminates guesswork and fitment issues by providing the exact lower rocker box seals engineered for this specific application. Installing the correct gaskets ensures a leak-free seal and preserves the integrity of your engine’s top-end assembly.
Technical Specifications:
- Manufacturer: S&S Cycle
- Part Number: 90-4120
- Coverage: Lower rocker boxes
- Quantity: Both boxes
- Application: OEM stock rocker boxes
- Compatibility: S&S cylinder heads
- Installation: Bolt-on replacement
- Material: OEM-specification gasket compound






