Fathead Hemi – High Ratio Rocker Arm System

Manton Fathead Hemi High Ratio Rocker Arm System

Explore our Fathead Rocker Arm Assembly with High Ratio Stands and Tool Steel Construction.

Includes: Complete Rocker Arm Assembly with Adjusting Screws and Jam Nuts

Specs:

Intake Ratio: 1.8
Exhaust Ratio: 1.7

At Manton, our mission is to deliver valvetrain solutions that redefine performance, reliability, and durability in high-speed engine applications exceeding 10,000 RPM. Addressing key challenges, we’ve perfected our rocker arm assemblies with:

Rocker Arm Geometry: Precision is paramount, especially at high RPMs. Our designs adhere to fundamental geometric principles, ensuring optimal performance under extreme conditions like manifold boost and cylinder pressure.

Oil Transfer and Leak Prevention: Utilizing forced oiling via the fourth cam bearing, our assemblies deliver continuous lubrication to both shafts through radial transfer passages. This minimizes oil spillage and pressure loss, enhancing overall efficiency and reliability.

Strength, Stability, and Durability: Reinforced with load screws at each rocker arm, our assemblies boast doubled strength. Heavy-duty rocker arm shafts and meticulously chosen materials ensure resilience and longevity. Heat treatment further enhances their durability, supporting consistent valve train control even at the highest RPMs.

With over a decade of rigorous testing, including race day simulations and extensive lab trials, our assemblies prove stable beyond 11,200+ RPM. They significantly extend the service life of valve springs, roller lifters, and all valvetrain components, delivering unmatched performance in demanding environments.

Embrace precision engineering with our Fathead Rocker Arm Assembly, designed for uncompromising performance and durability in competitive racing and high-performance applications.