6.125 4340 H-Beam Rod Set - GM LS

The 6.125 4340 H-Beam Rod Set from MANLEY is designed for high-performance GM LS-series engine builds, ensuring durability and reliability under extreme load conditions. This set is ideal for serious automotive enthusiasts and professional engine builders who require components that can withstand elevated boost, nitrous, or naturally aspirated applications.

Each rod in this eight-piece set features a length of 6.125 inches, a bushed small end, and 7/16-inch cap screws secured by ARP2000 bolts. The H-beam cross-section geometry provides a superior strength-to-weight ratio compared to traditional I-beam designs, allowing these rods to absorb shock loads effectively. Made from forged 4340 steel, these rods are heat-treated for optimal hardness, enhancing their resistance to fatigue cracking and plastic deformation.

This connecting rod set is engineered exclusively for LS-series engines, including LS1, LS2, LS3, and LS9, making it a perfect choice for building street performers, track cars, or competition engines. The ARP2000 fastener system ensures controlled preload, critical for preventing rod cap walk and micro-fracturing at the journal interface, thus providing peace of mind for high-RPM operation.