Carrillo BM4011-055 Forged Connecting Rod BMW Performance H-Beam

The Carrillo BM4011-055 is a high-performance forged connecting rod engineered for demanding BMW engine builds. Manufactured by CP-Carrillo — a name synonymous with precision and durability in motorsport — this rod is built to exceed the limits of factory hardware in both street performance and racing applications.

CP-Carrillo produces its connecting rods from a proprietary steel alloy known as Carrilloy, a chrome, nickel, moly, vanadium blend that meets all VAR (vacuum arc re-melt) ASTM standards. Each rod is forged from oversized stock to ensure proper grain flow and complete removal of surface inclusions, then subjected to a mar-aged heat treatment process for maximum tensile strength and ductility.

Key Features:

• Forged from proprietary Carrilloy steel — chrome, nickel, moly, vanadium alloy with VAR certification
• Fully CNC-machined to tight tolerances with probed dimensional verification at all critical stations
• 100% magnaflux inspected (minimum twice per rod) and Rockwell hardness tested after heat treatment
• Shot-peened finish for superior fatigue resistance and surface strength
• Matched and balanced set for optimal rotating assembly balance
• Includes high-quality Carrillo rod bolts — available in WMC or CARR bolt configurations
• Lightweight design reduces rotating mass compared to OEM rods
• Designed for high-RPM and high-horsepower BMW performance and racing applications

CP-Carrillo's exacting quality control and decades of motorsport development make the BM4011-055 a trusted choice for serious BMW engine builders seeking reliability under extreme loads.