BMW M3 3.0L E36 S50 I-Beam Connecting Rods

The I-Beam Connecting rods for BMW M3 3.0L E36 S50 are crafted from premium 4340 high tensile steel, featuring an optimized shape for superior performance and durability. The bushings are constructed from AMPCO 18 material, providing excellent resistance to wear and fatigue, and include a radial groove for oil retention. These rods are shot peened to reduce material stress and undergo multi-stage heat treatment to enhance rigidity. Precision manufacturing ensures perfect fitment and optimized oil clearances, with strict control over bend and twist.

Each rod is equipped with ARP 2000 cap fasteners rated at 220,000 psi, with an optional upgrade to ARP L19 material at 260,000 psi. The kit includes ARP moly and comprehensive fitting instructions.

Additional Machining Processes

• Dowel sleeves for precise fit and accurate re-assembly
• Lipped Cap Relief for enhanced big-end integrity under extreme conditions
• Grooves in Thrust Face for weight reduction

Technical Features of ZRP Connecting Rods

• I-Beam Shape for increased rigidity
• Two-Piece forging for exceptional strength
• Shot Peening for improved fatigue life
• Magnaflux Inspection ensures material consistency meets high-quality standards
• Double ribbed caps for additional support
• Multi Stage Heat Treatment for maximum strength, dimensional stability, and fatigue life
• CNC machining for superior tolerances, precise to 0.0002"
• Center to center maintained under .001" tolerance
• Finite Element Analysis (FEA) for computer-generated stress analysis of con rods
• Optimal balancing for weight-matched sets of ± 1 gram