
Ensure optimal performance and leak prevention with the Cummins 3963379 Rocker Box Gasket, a premium direct-fit replacement for 5.9/6.7 Cummins engines. Crafted from high-quality materials, this gasket guarantees a perfect seal and maintains factory fit and function. Designed for durability and reliability, it helps protect your rocker box and engine from leaks. Ideal for maintaining your engine’s integrity and performance. Upgrade today for a secure and efficient solution.
Key Features:
- Direct-Fit Replacement: Perfectly matches the original part for easy installation.
- High-Quality Construction: Made from durable materials for long-lasting performance.
- Leak Prevention: Ensures a tight seal to protect against oil and coolant leaks.
- Maintains Factory Performance: Keeps your engine running smoothly and efficiently.
Keep your Cummins engine running like new with the Cummins 3963379 Rocker Box Gasket.

Ensure optimal performance and leak prevention with the Cummins 3963379 Rocker Box Gasket, a premium direct-fit replacement for 5.9/6.7 Cummins engines. Crafted from high-quality materials, this gasket guarantees a perfect seal and maintains factory fit and function. Designed for durability and reliability, it helps protect your rocker box and engine from leaks. Ideal for maintaining your engine’s integrity and performance. Upgrade today for a secure and efficient solution.
Key Features:
- Direct-Fit Replacement: Perfectly matches the original part for easy installation.
- High-Quality Construction: Made from durable materials for long-lasting performance.
- Leak Prevention: Ensures a tight seal to protect against oil and coolant leaks.
- Maintains Factory Performance: Keeps your engine running smoothly and efficiently.
Keep your Cummins engine running like new with the Cummins 3963379 Rocker Box Gasket.