Carrillo DM6418H-8 Pro-H Connecting Rods for 6.6L Duramax LB7 LLY LBZ with 7/16 WMC Bolts

Built to the exacting standards that have made CP-Carrillo the world's premier custom connecting rod manufacturer since 1963, this set is purpose-built for high-performance diesel applications including sled pulling, drag racing, and extreme-duty use.

Each rod is forged from a proprietary chrome, nickel, moly, vanadium alloy that meets stringent VAR (Vacuum Arc Re-Melt ASTM) standards. The heat treatment is validated by both the material supplier and an independent metallurgist, resulting in an ultimate tensile strength (UTS) of 195,000 psi and a yield strength of 182,000 psi — while maintaining critical low notch-sensitivity and ductility.

Key Features:

• Pro-H beam design — the stoutest beam configuration available, capable of handling up to 2,000 HP
• 7/16" WMC (H-11 Tool Steel) bolts included
• Center-to-center length: 6.418 in. (163.02 mm)
• Pin End (PE) Width: 1.261 in. tapered (32.03 mm)
• Big End (BE) Width: 1.119 in. (28.42 mm)
• Big End (BE) Bore: 2.6372 in.
• Manufactured from oversized forgings for optimal grain flow and elimination of surface inclusions
• CNC-machined with probing technology to validate dimensional accuracy
• Each rod is magnafluxed a minimum of twice during production
• Rockwell hardness tested to validate the heat treat procedure
• Final shot peen operation for enhanced surface durability
• Made in Irvine, California, USA

CP-Carrillo's Pro-H connecting rods are the benchmark for high-performance diesel engine builds, trusted by top teams and racers worldwide. Whether you're building a street/strip Duramax or an all-out competition engine, the DM6418H-8 delivers the strength and precision your build demands.