Carrillo SC7025-4 Performance Connecting Rod Set with CARR-S7 Bolts

Designed for demanding performance and racing applications, these rods are manufactured in the USA from CP-Carrillo's proprietary Carrilloy steel — a chrome, nickel, moly, vanadium alloy that meets VAR (Vacuum Arc Re-Melt) ASTM standards for exceptional strength and consistency.

Key Features:

• Proprietary Carrilloy Steel Forging: Machined from oversized forgings to ensure proper grain flow and removal of any surface inclusions
• CARR-S7 Multiphase Fasteners (MP35N): Upgraded rod bolts with a 285 KSI ultimate tensile strength — rated for unlimited torque cycles when the stretch method is followed
• Asymmetrical Thread Design: Each thread features a slightly different profile than the previous, providing evenly distributed thread engagement for increased clamp load and fatigue life
• Shot Peened Surface: Cold-working process that replaces tensile stress with beneficial compressive stress, significantly increasing fatigue life
• Multi-Level Inspection: Every rod undergoes CP-Carrillo's rigorous quality control process in their climate-controlled inspection facility
• Made in the USA: Designed and manufactured at CP-Carrillo's facility in Irvine, California

CP-Carrillo recommends using the bolt stretch method over torque-to-spec installation to ensure accurate and consistent preload. Assembly lube should be applied to both the threads and under the bolt head during installation. The CARR-S7 bolt is the preferred choice for high-RPM and high-horsepower builds where maximum fastener reliability is critical.