Speedmaster H-Beam 6.385" Connecting Rods Chevy BBC 454 4340 Steel ARP 8740 Bolts

The Speedmaster H-Beam Connecting Rods (part 1-274-024) are precision engineered engine connecting rods designed specifically for Chevy big-block BBC 454 applications. Manufactured from durable 4340 steel with H-beam construction, these connecting rods feature ARP 8740 fasteners for enhanced reliability and load-bearing capacity. With dimensions of 6.385" length, 2.200" big end bore, and 0.990" small end diameter, they deliver the strength and durability required for high-performance and street racing engine builds.

These connecting rods are engineered to support aggressive engine builds and demanding driving conditions. The H-beam design provides excellent strength-to-weight ratio, critical for reducing reciprocating mass while maintaining structural integrity under load. Installation requires proper engine assembly knowledge and complementary internal components. Ideal for engine rebuilds, performance upgrades, and restoration projects on classic and modified Chevy BBC 454 motors.

Key Features & Benefits

• 4340 Steel Construction: Premium 4340 steel material provides superior strength and durability for high-performance applications.
• H-Beam Design: H-beam profile optimizes strength-to-weight ratio for reduced reciprocating mass.
• ARP 8740 Fasteners: ARP grade 8740 bolts ensure reliable clamping force and load-carrying capacity.
• BBC 454 Fitment: Engineered for Chevy big-block 454 engine compatibility.
• Precision Dimensions: 6.385" length, 2.200" big end bore, and 0.990" small end diameter.

Specifications

Ideal Applications

• High-performance Chevy BBC 454 engine builds and upgrades
• Engine rebuilds and restoration on classic Chevy big-block motors
• Street racing and performance driving applications
• Custom engine assembly projects requiring durable internal components