Callies U16210 Ultra H-Beam Connecting Rods 6.535in. Forged 4330 Steel Big Block Chevy

Measuring 6.535 inches in length and constructed from forged 4330V steel, these rods are shot-peened for added surface strength and fatigue resistance.

Key Features:

• H-Beam design built to handle the demands of the most rigorous racing applications
• Forged Timken 4330V steel — a proprietary alloy formulated to Callies' exact specifications for superior cleanliness and strength
• Precision forged in Trenton, Michigan and fully machined in Callies' Fostoria, Ohio facility — 100% made in the USA
• ARP cap screws — high-alloy fasteners produced specifically for severe-duty service, with rolled threads for consistent clamping load
• 260 Ksi Ultra Bolts — specifically designed to fit each rod with full thread engagement to eliminate exposed threads between the bolt thread and shank
• Shot-peened finish for enhanced surface fatigue life

Note: Custom pistons are required when using connecting rods longer than the stock length.

Callies Ultra connecting rods are manufactured with meticulous attention to detail, and the complete manufacturing history of every rod is tracked and maintained by Callies' production team. These rods deliver dependable, consistent performance in demanding high-horsepower and high-RPM builds.