Carrillo SCR5425-4 Pro-A Beam Forged Connecting Rods

Engineered for naturally aspirated and performance street builds, the Pro-A beam profile delivers an excellent balance of reduced rotating mass and proven Carrillo durability.

Key Features:

• Pro-A Beam Design: Lightweight, aerodynamic beam profile reduces rotating assembly mass, allowing the engine to rev more freely with less internal drag
• Rod Length: 5.234" center-to-center
• Wrist Pin: 20mm bushed, full-floating configuration
• Rod Bolt: 3/8" WMC (World Motorsport Competition) bolt
• Advertised Weight: 427g per rod
• Carrilloy Alloy Steel: Proprietary chrome, nickel, moly, vanadium alloy meeting all VAR (vacuum arc re-melt) ASTM standards — validated by both the supplier and an independent metallurgist
• Oversized Forging: Manufactured from oversized proprietary steel forgings for optimal grain flow and removal of surface inclusions
• Precision CNC Machining: All critical CNC machines equipped with probing to validate dimensional integrity
• Rigorous Quality Control: Each rod is magnafluxed at least twice and Rockwell tested to validate the heat treat procedure
• Shot Peen Finish: Final controlled shot peen operation relieves tensile stress and improves fatigue life
• Spec Card Included: Every rod ships with a specification card listing part number, critical dimensions, weight, and job number for traceability
• Made in the USA

The Carrillo Pro-A beam is the lightest and most economical rod in the Carrillo performance lineup, making it the ideal choice for all-motor and naturally aspirated performance builds where minimizing rotating mass is the priority. Each set is precision matched and manufactured to Carrillo's exacting tolerances, ensuring consistent and reliable performance from the street to the track.