Speedmaster 1-274-010 I-Beam Connecting Rods 6.135" Chevy BBC 454 5140 Steel ARP 2000

Speedmaster I-beam connecting rods are precision-engineered for high-performance big block Chevy 454 applications, combining traditional I-beam design with advanced strength features typically found in H-beam rods. These forged 5140 steel connecting rods deliver exceptional durability and reliability for street and performance builds.

Key Specifications:

• Center-to-center length: 6.135 inches
• Big end bore: 2.200 inches
• Pin bore: 0.990 inches
• Material: Forged 5140 steel
• Fasteners: ARP 2000 series connecting rod bolts

Premium Construction Features:

• One-rib cap design provides enhanced strength and superior bearing support
• Polished beam surfaces eliminate stress risers and potential failure points
• Profiled with generous clearance for long-stroke crankshaft applications
• Shot peened and stress relieved on all surfaces for maximum fatigue resistance
• X-ray and ultrasonic tested to ensure structural integrity
• Precision CNC-machined to exacting tolerances

ARP 2000 Series Fasteners:

• Heat-treated for superior strength and durability
• Rolled threads provide up to 10 times more fatigue strength than standard bolts
• Engineered to handle extreme cylinder pressures in high-combustion engines
• Far superior to OEM fasteners in clamping force and reliability

These connecting rods are ideal for serious street performance, bracket racing, and moderate boost applications where reliability and consistent performance are essential. The combination of quality forged steel construction and premium ARP hardware ensures these rods can handle significantly more power than stock components.