SKU: PFM66915C
UPC: 037995619153
MPN: 66915C
The PROFORM SBC Roller Rocker Arms - 1.6 Ratio - 3/8-inch Stud are designed for small-block Chevrolet builders looking for reliable valve actuation in both street and performance applications. These roller rocker arms are an upgrade from traditional stamped steel rockers, enhancing efficiency and durability for engine builders focused on improving their valve train.
The 1.6:1 lift ratio geometry allows for increased valve lift, effectively amplifying the camshaft's motion for better volumetric efficiency and valve opening speed. Roller tips minimize friction at the pushrod interface, which reduces parasitic drag and heat generation—an essential benefit during high-RPM operation. Constructed from cast iron with precision-machined bearing surfaces, these rocker arms ensure consistent performance across numerous heat cycles and valve events.
Mechanics and enthusiasts upgrading carbureted or EFI small-block Chevrolet engines will find these rocker arms compatible with standard 3/8-inch stud holes found on most SBC heads. Installation is straightforward, requiring only basic hand tools and a torque wrench, while the rocker arm geometry maintains correct valve timing without the need for adjustments to existing setups.
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