BBF Ultra Pro Magnum XD R/A's - 1.73 7/16

The COMP CAMS BBF Ultra Pro Magnum XD R/A rocker arms with a 1.73 ratio and 7/16 stud are designed for big-block Ford engines that require maximum valve lift and aggressive valve train geometry. These rocker arms are ideal for serious engine builders and performance enthusiasts looking to enhance their engine's capabilities.

With a 1.73 rocker arm ratio, these components increase valve lift multiplication, allowing for higher and faster valve openings compared to stock designs. The 7/16-inch stud diameter provides superior clamping force and load distribution, which is essential for handling high spring pressures and rapid valve acceleration in racing applications. COMP CAMS utilizes premium materials and precision CNC machining to ensure tight tolerances and consistent performance across all units.

These rocker arms are particularly beneficial for big-block Ford applications, including 427 and 460 configurations, where OEM or stock-clone arms may not support high-lift camshaft profiles or elevated spring pressures exceeding 300 pounds. Engine builders can rely on the Ultra Pro Magnum XD designation for durability and repeatability in extreme operating conditions.