Carrillo SCR5539-5 Pro-A Connecting Rod Kit with WMC Bolts

The Pro-A beam design is purpose-engineered as a lightweight rod optimized for high engine speeds where minimizing reciprocating mass is critical to performance.

Key Features:

• Rod Design: Pro-A beam — a lightweight configuration engineered for high-RPM applications and limited cylinder pressures
• Rod Length: 5.670" (144.0mm) center-to-center
• Wrist Pin: 20mm bushed, full-floating design
• Rod Bolt: 3/8" WMC (non-stretch) high-performance fasteners
• Advertised Weight: Approximately 555g per rod
• Material: Proprietary "Carrilloy" alloy — a chrome, nickel, moly, vanadium steel meeting VAR (vacuum arc re-melt) ASTM standards
• Made in USA at CP-Carrillo's manufacturing facility in Irvine, California

CP-Carrillo Manufacturing Standards:

• Manufactured from oversized proprietary steel forgings to ensure proper grain flow and removal of surface inclusions
• Each rod is magnafluxed (magnetic particle tested) at least twice during production
• Rockwell hardness tested on every unit to validate the heat treatment procedure
• Final controlled shot peen operation for improved fatigue life
• Each rod laser-etched with a job number for full traceability
• Sold as a complete, precision-matched and balanced set

The SCR5539-5 is the 5-piece variant of the SCR5539 series, making it the correct choice for 5-cylinder VW/Audi engine builds. CP-Carrillo connecting rods are a trusted choice for serious performance engine builders seeking a combination of reduced reciprocating weight, dimensional precision, and proven durability under high-stress racing conditions.