Eagle 138734130 LS Competition Rotating Assembly Stroke H-Beam Rods - 3.900 6.125

The Eagle 138734130 is a high-performance competition rotating assembly designed for GM LS engines, engineered to deliver exceptional strength and reliability for demanding applications. This complete kit provides everything needed for a serious engine build capable of handling high horsepower levels.

Key Components:

• Forged 4340 steel crankshaft with 3.900" stroke and 58-tooth reluctor for superior strength and durability
• 6.125" forged 4340 steel H-beam connecting rods with 7/16" ARP 8740 bolts for maximum power handling
• Forged 4032 aluminum DSS pistons with -15cc dish design for optimized compression
• Premium piston rings and high-performance engine bearings included
• Weight-matched components for smooth operation and reduced vibration

Eagle's competition rotating assemblies feature forged 4340 steel construction throughout, providing outstanding strength while maintaining reasonable weight. Each connecting rod is multi-stage heat-treated, X-rayed, sonic-tested, magnafluxed, fully machined, and shot-peened to stress-relieve the metal. The H-beam rod design offers an excellent balance of strength and weight for high-performance applications producing over 500 horsepower. Precision cap alignment sleeves positively locate each rod cap, while silicon bronze bushings accommodate full-floating piston pins.

This assembly is ideal for serious street/strip builds, forced induction applications, and competition engines where reliability and power-handling capability are paramount. Professional balancing and proper assembly procedures are required for installation.