Carrillo DC7559S-6 Pro-H Connecting Rod Set with CARR Bolts and Cap Relief

Featuring a heavy-duty Pro-H beam profile with a cap relief design and 7/16-inch CARR Multiphase bolts, this set is purpose-built to handle extreme cylinder pressures encountered in performance street, competition, sled pulling, and drag racing applications.

Key Features:

• Pro-H Beam Design: The stout H-beam profile provides maximum strength and rigidity, capable of withstanding the most abusive forces inside a high-boost diesel engine
• Cap Relief Design: The relief machined into the rod cap reduces stress concentration at the bolt hole, allowing for controlled flex under extreme load and improving fatigue life
• 7/16" CARR Multiphase Bolts: Premium CP-Carrillo fasteners with excellent fatigue resistance and repeatable stretch specifications, ideal for high-performance street, strip, and competition use
• Proprietary Carrilloy Steel: Manufactured from a proprietary chrome, nickel, moly, vanadium alloy meeting all VAR (Vacuum Arc Re-Melt) ASTM standards
• Mar-Aged Heat Treatment: All heat treat processes result in an Ultimate Tensile Strength (UTS) of 195,000 psi with a yield of 182,000 psi, while maintaining low notch-sensitivity and ductility
• Oversized Forging Process: Each rod is machined from an oversized forging to ensure proper grain flow and to eliminate potential surface inclusions or conversions generated during the forging process
• CNC Precision Machining: All critical CNC machines are equipped with in-process probing to accurately validate dimensional integrity on every part
• Dual Quality Inspection: Each rod is magnafluxed at least twice during production, then Rockwell tested to validate heat treat compliance, and finished with a shot peen operation
• Center-to-Center Length: 7.559 inches (192.00 mm)
• Pin Size: 1.575 inches
• Big End (BE) Bore: 2.874 inches (73.00 mm)

Made in the USA at Carrillo's Irvine, California headquarters, the DC7559S-6 represents over six decades of connecting rod engineering expertise. Whether you're building a high-boost daily driver or an all-out competition engine, these rods deliver the strength, precision, and reliability required to support serious power levels.