Speedmaster 1-274-024 H-Beam Connecting Rods 6.385" BBC 454 4340 Steel with ARP 8740 Bolts

Speedmaster 1-274-024 H-beam connecting rods are engineered for high-performance Chevy Big Block 454 applications, delivering exceptional strength and reliability for supercharged, turbocharged, and nitrous-fed engines. Manufactured from aircraft-quality 4340 chromoly steel, these rods provide the durability needed to withstand extreme combustion pressures and high RPM operation.

Key Specifications:

• Center-to-center length: 6.385 inches
• Big end bore diameter: 2.200 inches
• Pin bore diameter: 0.990 inches
• Material: 4340 chromoly steel construction
• Includes ARP 8740 connecting rod bolts

Performance Features:

• H-beam design provides superior strength-to-weight ratio
• Special doweled cap ensures precise cap-to-rod alignment
• Extra clearance profiling for stroker crankshaft compatibility
• X-ray and ultrasonic testing for quality assurance
• Shot peened and stress-relieved surfaces for enhanced fatigue resistance
• Precision CNC-machined ARP bolts with rolled threads for up to 10x greater fatigue strength than OEM fasteners

These connecting rods are ideal for racers and performance enthusiasts building serious power in their Big Block Chevy engines. The combination of premium 4340 steel construction and ARP 8740 fasteners ensures your engine can handle the demands of high-horsepower applications with confidence.