6.125 in. Length | 2.125 in. Big-End Bore | 0.927 in. Pin | Set of 8 | Small Block Chevy

Build your Chevrolet Small Block V8 rotating assembly around Manley 14255R6-8, a 8-piece connecting rod set in the Pro Series I-Beam range. This version combines 6.125 in. center-to-center length, a 2.125 in. big-end housing bore and a 0.927 in. wrist-pin configuration with 7/16 in. ARP Custom Age 625+ cap screws. The exact dimensions, material and supplied fasteners identify the rod combination you are buying.

Key Features & Specs:

• Center-to-Center Length: 6.125 in.
• Wrist Pin Diameter: 0.927 in.
• Pin End Bore: 0.9281 in.
• Big End Housing Bore: 2.125 in.
• Crank Journal Diameter: 2.000 in.
• Length Configuration: 0.425 in. longer than stock
• Pin End Width: 1.000 in.
• Rod Material: Forged 4340 steel
• Rod Bolts: 7/16 in. ARP Custom Age 625+ cap screws
• Quantity: Set of 8
• Series: Pro Series I-Beam
• Beam Design: I-Beam
• Approximate Rod Weight: 675 g per rod
• Engine Type: Internal combustion
• Additional Engine Application: Gen III 5.7L / 6.1L / 6.4L HEMI stroker with 2.000 in. SBC crank journal
• Engine Application: Chevrolet Small Block V8
• Brand: Manley Performance
• Manufacturer Part Number: 14255R6-8
• Product Type: Engine connecting rod set

Performance Construction:

Manley’s Pro Series I-Beam is built around a fully machined forged 4340 profile and precision engine-specific geometry. Shot peening after machining and individual magnetic-particle inspection complement the rod’s finish and supplied ARP cap screws. This combination brings the material, machining process and hardware together in a purpose-built performance connecting rod.

For a Small Block Chevrolet build, rod length and crank journal size are defining parts of the rotating assembly. This configuration brings those dimensions together with its stated wrist-pin size, making the set a clear choice for an engine combination designed around the listed length and journal arrangement.

The 0.9281 in. pin-end bore and 2.125 in. big-end housing bore describe the two rod ends, while the 6.125 in. center-to-center measurement defines rod length. The crankshaft journal configuration is 2.000 in., paired with the housing bore specified below. Average rod weight is approximately 675 g per rod, giving this exact MPN a useful weight reference alongside its dimensions. The pin end measures 1.000 in. wide.

The supplied 7/16 in. ARP Custom Age 625+ cap screws are part of this rod’s specification. This ARP Custom Age 625+ version brings the stated fastener grade together with the 4340 steel I-Beam profile, pairing the documented fastener package with the forged rod construction.

Fitment:

• Chevrolet Small Block V8
• Gen III 5.7L / 6.1L / 6.4L HEMI stroker, 2.000 in. SBC journal configuration

What’s Included:

• 8 Manley Pro Series I-Beam connecting rods, manufacturer part number 14255R6-8
• 7/16 in. ARP Custom Age 625+ cap screws supplied with the rods