Manley 15555-8 300M Dirt Series I-Beam Connecting Rods 6.125" SB-Chevy

With a 6.125" (+.425") center-to-center length, these rods are purpose-built for builders seeking maximum strength and reliability under the extreme demands of dirt track competition.

Key Features:

• Material: Forged 300M aircraft-quality vacuum degassed steel alloy — one of the strongest rod materials available for racing
• Design: Fully machined I-beam profile for optimal strength-to-weight ratio
• Length: 6.125" center-to-center (+.425" over stock)
• Crankshaft Journal Size: 2.000" (small journal) with 2.125" big end bore
• Piston Pin Bore: 0.9281" bushed for full-floating wrist pin fit
• Cap Fasteners: 7/16" ARP 2000 high-strength cap screws
• Weight: Approximately 645 grams per rod
• Finish: Shot peened after machining to Mil-Spec standards and 100% individually magnafluxed for quality assurance

Manley's Dirt Series rods are forged from 300M vacuum degassed alloy steel — a material prized for its exceptional tensile strength and resistance to fatigue — then fully machined to minimize weight while maximizing structural integrity. Each rod is shot peened post-machining and individually magnafluxed to ensure zero defects before leaving the factory. The included ARP 2000 7/16" cap screws provide the clamping force necessary to survive the punishment of high-RPM dirt track racing. These rods are the benchmark choice for serious Small Block Chevy late model and dirt oval builds.