SBF Ultra Pro Magnum XD R/A's - 1.7 7/16

The SBF Ultra Pro Magnum XD R/A's rocker arms are designed specifically for small block Ford performance applications, ensuring precise valve timing and durability under high-RPM conditions. This set of 16 rocker arms features a 1.7:1 lift ratio and a 7/16-inch stud mount configuration, making them ideal for street, strip, and competition engines where maximizing power is essential.

Constructed from high-strength chromoly steel, these rocker arms are built to withstand the demands of aggressive cam profiles and higher valve spring rates. The full roller design minimizes friction at the valve tip, which helps reduce parasitic drag and promotes consistent valve actuation across the RPM range. The 1.7 ratio effectively multiplies cam lobe lift, enhancing valve lift and duration for improved camshaft performance.

Engine builders working with classic 289, 302, or modern 5.0L crate platforms will find the Ultra Pro Magnum XD rocker arms to be a reliable choice when transitioning to more aggressive setups. This set replaces both intake and exhaust sides, simplifying the purchasing process and ensuring consistent performance across all eight cylinder positions.