Carrillo SC7131-4 Pro-H Forged Connecting Rod

Built in the USA by CP-Carrillo, these connecting rods are precision-machined from Carrillo's proprietary Carrilloy (4330M chromoly steel) — a chrome, nickel, moly, vanadium alloy that meets all VAR (vacuum arc re-melt) ASTM standards for maximum strength, fatigue resistance, and reliability.

Key Features:

• Proprietary Carrilloy steel forging — manufactured from oversized forgings to ensure proper grain flow and elimination of surface inclusions
• H-beam design — delivers superior strength-to-weight ratio for high-RPM and high-horsepower applications
• Shot-peened finish — relieves tensile stresses and introduces beneficial compressive stresses to maximize fatigue life
• Magnafluxed twice during production — magnetic particle testing identifies any surface flaws for uncompromising quality control
• Rockwell hardness tested — every rod is individually tested to validate the heat treat procedure
• CARR or WMC bolt options — high-strength connecting rod bolts with asymmetrical threads for superior clamping load and fatigue life
• CNC-machined with in-process probing — dimensional integrity validated at every critical step
• Laser-serialized for full part traceability
• Made in the USA at CP-Carrillo's Southern California facility

CP-Carrillo connecting rods are the choice of professional engine builders across drag racing, road racing, oval track, and endurance motorsports. The SC7131-4 set delivers the precision tolerances, certified materials, and proven reliability that serious performance builds demand.