Callies U16200 Ultra H-Beam Connecting Rods 6.385" Big Block Chevy

The Callies U16200 Ultra H-Beam Connecting Rods are precision-engineered, high-performance connecting rods designed for Big Block Chevy applications demanding maximum strength and reliability. Built entirely in the USA, these rods are the choice of serious engine builders chasing high horsepower and high-RPM durability.

Each rod is forged from specially formulated Timken 4330V steel to exacting Callies specifications, then precision forged in Michigan and fully machined at Callies' Fostoria, Ohio facility. The H-beam design incorporates numerous geometric refinements that optimize the rod against the specific loads and stresses encountered in high-load, high-RPM racing and performance environments.

Key Features:

• Beam Style: H-beam
• Center-to-Center Length: 6.385 in.
• Material: Forged Timken 4330V steel
• Wrist Pin Style: Full-floating, bushed
• Pin End Bore Diameter: 0.990 in.
• Pin End Width: 1.055 in.
• Big End Bore Diameter: 2.3250 in.
• Rod Journal Diameter: 2.200 in.
• Big End Width: 0.990 in.
• Wrist Pin Bushing: AMS 642 bronze alloy to eliminate deformation and extrusion
• Rod Bolts: ARP L19 high-alloy cap screws, 7/16 in., 12-point head style
• Bolt Tensile Strength: 230,000 psi
• Advertised Weight: 799 grams per rod (weight-matched set)
• Horsepower Rating: Up to 1,500 hp
• Clearanced for Stroker: Yes
• Shot-Peened: Yes
• Magnafluxed: Yes
• Manufactured: 100% USA

The included ARP L19 cap screws feature rolled threads for improved thread engagement and a smoother, more consistent clamping load — critical in severe-duty racing applications. The AMS 642 bronze alloy wrist pin bushings resist deformation under extreme loads, ensuring long service life even under sustained high-RPM operation. Every rod in the set is weight-matched for optimal rotating assembly balance.