Speedmaster 1-274-022 H-Beam Connecting Rods 6.135" BBC 454 4340 Chromoly with ARP 8740 Bolts

Speedmaster H-beam connecting rods deliver exceptional strength and durability for high-performance Chevy BBC 454 engines. Manufactured from aircraft-quality 4340 chromoly steel, these connecting rods are engineered to handle the extreme demands of supercharged and nitrous oxide applications.

Key Specifications:

• Center-to-center length: 6.135 inches
• Big end bore: 2.200 inches
• Pin bore: .990 inches (0.990")
• Material: 4340 chromoly steel
• Design: H-beam profile for maximum strength-to-weight ratio
• Fasteners: ARP 8740 connecting rod bolts included

Performance Features:

• Doweled cap design ensures precise cap-to-rod alignment for consistent performance
• Extra clearance profiling accommodates stroker crankshaft applications
• X-ray and ultrasonic testing verifies structural integrity
• Shot peened and stress relieved on all surfaces to enhance fatigue resistance
• Precision CNC-machined to exacting tolerances

ARP 8740 Bolt Advantages:

• Heat-treated for superior strength and reliability
• Rolled threads provide up to 10 times more fatigue strength than standard bolts
• Far superior to OEM fasteners for high-combustion engine applications
• Designed to handle extreme cylinder pressures and loads

These H-beam connecting rods are the ideal choice for serious engine builders looking to maximize reliability and performance in demanding racing and high-horsepower street applications.