Fathead Hemi – High Ratio Rocker Arm System ( Raised Exhaust Shaft )

Manton Fathead Hemi High Ratio Rocker Arm System ( Raised Exhaust Shaft )

Explore the Fathead Rocker Arm Assembly with High Ratio Stands and Tool Steel 1.8 BP INT & 1.7 BP EXH (with raised exhaust shaft).

Includes:

• Complete Rocker Arm Assembly with Adjusting Screws and Jam Nuts

Specs:

Intake Ratio: 1.8
Exhaust Ratio: 1.7

Our goal is to deliver valvetrain solutions that excel in performance, reliability, and durability, especially in applications pushing beyond 10,000+ RPM. Addressing critical design challenges, we focused on enhancing:

Rocker Arm Geometry: Precision in rocker arm geometry is crucial at high RPMs. We meticulously corrected and optimized our rocker arm assemblies to ensure optimal engine performance and longevity.

Oil Transfer and Leakage Prevention: Featuring forced oiling via the fourth cam bearing. Our design ensures consistent lubrication to both shafts. Tight tolerances between rocker arm stands and shafts minimize oil spillage and pressure loss. Transitioning from stock to Manton assemblies typically increases oil pressure by 10 to 15 pounds without the need for restrictor jets.

Strength, Stability, and Durability: Incorporating load screws at each rocker arm significantly enhances assembly strength. Heavy-duty shafts and precise material selection further reinforce durability. Rigorously tested in race day environments and labs, our assemblies maintain valve train control even at speeds exceeding 11,200+ RPM. Therefore, extending the service life of components like valve springs and roller lifters.

Our stands are categorized into Low and High ratios based on exhaust rocker arm ratios: Low (1.6 to 1) and High (1.7 to 1), while the intake ratio remains consistently high at 1.8.

Discover why precision engineering matters with our Fathead Rocker Arm Assembly, crafted for unmatched performance and reliability in demanding racing scenarios.