Speedmaster 1-274-036 I-Beam Connecting Rods 6.385" 4340 Steel Chevy BBC 454 ARP 2000

Speedmaster I-Beam Pro connecting rods are precision-engineered for high-performance big block Chevy 454 engines producing 1000+ horsepower. Manufactured from aircraft-grade 4340 chromoly steel, these connecting rods deliver exceptional strength and reliability for demanding racing applications.

Specifications:

• Center-to-center length: 6.385 inches
• Big end bore: 2.200 inches
• Pin bore: .990 inches (0.990")
• Material: 4340 chromoly steel
• Design: I-beam profile with one-rib cap
• Fasteners: ARP 2000 series connecting rod bolts

Key Features:

• I-beam design incorporates strength-enhancing features from H-beam technology
• One-rib cap design provides added strength and superior bearing support
• Polished beams eliminate stress risers for improved fatigue resistance
• Profiled with clearance for long stroke crankshaft applications
• X-ray and ultrasonic tested for quality assurance
• All surfaces shot peened and stress relieved for maximum durability

ARP 2000 Fasteners:

• Precision CNC-machined to exact specifications
• Heat-treated with rolled threads for superior strength
• Up to 10 times more fatigue strength than OEM fasteners
• Designed for high-combustion racing engines

Ideal for serious racers and engine builders who demand the highest quality connecting rods for big block Chevy performance applications.