Carrillo SCR5315-4 Pro-SA Forged Steel Connecting Rods

The Pro-SA series occupies the middle ground in Carrillo's connecting rod lineup, featuring an increased beam thickness compared to standard A-beam rods for superior load capacity, while maintaining the same precision tolerances as the top-tier Pro-H series.

Key Features:

• Pro-SA Super A-Beam design — increased beam thickness handles higher load capacities than standard A-beam rods
• Carrilloy proprietary alloy — chrome, nickel, moly, vanadium steel meeting VAR (vacuum arc re-melt) ASTM standards for exceptional strength and fatigue resistance
• Oversized forging process — ensures proper grain flow and eliminates surface inclusions for maximum material integrity
• 3/8" WMC rod bolts — patented asymmetrical thread design for optimized clamp load and improved fastener fatigue life
• Full floating wrist pin bushing — reduces wear and accommodates high-rpm operation
• Dual magnaflux inspection — each rod is magnafluxed at least twice during production to detect surface flaws
• Rockwell hardness tested — every rod is individually tested to validate the heat treat procedure
• Shot peen finished — final shot peen operation relieves tensile stress and improves fatigue life
• CNC-probed dimensional validation — all critical machining centers use probing for precise dimensional integrity
• Made in the USA

Carrillo's rigorous multi-step inspection process — including magnaflux testing, Rockwell hardness testing, and a controlled shot peen operation — ensures each rod meets the exact specifications required for reliable performance in high-horsepower and high-rpm environments. The SCR5315-4 is an ideal upgrade for builders seeking a stronger, lighter, and more precisely manufactured connecting rod over OEM components.