Carrillo BF9870-STDB Pro-H Beam Performance Connecting Rod

The Carrillo BF9870-STDB is a high-performance forged connecting rod engineered for demanding racing and performance engine builds. Built to CP-Carrillo's exacting standards, this rod is designed to deliver exceptional strength, durability, and reliability where stock connecting rods simply cannot keep up.

Key Features:

• Manufactured from CP-Carrillo's proprietary Carrilloy steel — a chrome, nickel, moly, vanadium alloy meeting all VAR (vacuum arc re-melt) ASTM standards
• Forged from oversized blanks to ensure proper grain flow and eliminate surface inclusions from the forging process
• Each rod is magnafluxed at least twice during production and Rockwell tested to validate heat treatment
• Final controlled shot-peen operation for enhanced fatigue resistance
• Equipped with STDB (steel double bolt) fasteners for secure, high-clamping-load assembly
• All Carrillo rod bolts feature asymmetrical threads for evenly distributed thread engagement, improved clamp load, and extended fastener fatigue life
• Every rod ships with a specification card listing part number, critical dimensions, weight, job number, and bolt installation data for full traceability
• Includes CP-Carrillo's proprietary assembly lubricant for proper fastener installation
• Made in the USA at CP-Carrillo's Southern California facility

CP-Carrillo connecting rods are trusted by professional engine builders across motorsports disciplines. Proper installation using the bolt stretch method — rather than torque alone — is recommended for optimal clamp load and fastener longevity.