Speedmaster part number 1-274-038 delivers a complete set of H-beam connecting rods precision-forged from 4340 chromoly steel for exceptional strength and durability in high-performance Big Block Chevy 454 applications. Each rod measures 6.385" center-to-center length with a 2.200" big-end bore and a 0.990" pin bore, providing an accurate drop-in fit for BBC 454 builds demanding reliable power under race conditions.
Every rod comes equipped with premium ARP 2000 fasteners, offering superior clamping force and fatigue resistance compared to stock hardware — giving builders confidence in high-RPM and high-boost environments. The H-beam profile balances weight reduction with structural rigidity, making these rods an ideal upgrade for street/strip or dedicated racing engines in Big Block Chevy 454 combinations.
