Speedmaster PCE274.1059 H-Beam Connecting Rod 6.735" Oldsmobile 400 425 455 4340 Steel

The Speedmaster PCE274.1059 is a high-performance H-beam connecting rod engineered for Oldsmobile big-block engines, specifically designed to fit 400, 425, and 455 cubic-inch displacement applications. Built from 4340 steel with bronze bushings, this connecting rod delivers the strength and durability required for increased boost, higher RPM operation, and forced-induction builds while maintaining OEM-style fitment and geometry.

With a 6.735" length, 2.499" big-end bore diameter, and 0.98" small-end pin bore, this rod is precision-engineered to work seamlessly in original Oldsmobile engine blocks without modification. The H-beam profile provides excellent strength-to-weight characteristics, making it an ideal choice for street performance, drag racing, and engine rebuilds where reliability and longevity matter. Whether you're restoring a classic Oldsmobile muscle car or building a competitive powerplant, this connecting rod offers the precision fitment and material quality that serious engine builders trust.

Key Features & Benefits

• H-Beam Design: Optimized strength-to-weight profile for high-RPM and boost applications.
• 4340 Steel Construction: Premium material engineered for durability and resistance to fatigue.
• Bronze Bushings: Precision bushing material for smooth, reliable small-end operation.
• Oldsmobile Big-Block Fitment: Direct fit for 400, 425, and 455 cubic-inch engines without modification.
• Precision Dimensions: 6.735" length with 2.499" big-end and 0.98" small-end bores.

Specifications

Ideal Applications

• High-performance engine rebuilds for Oldsmobile big-block platforms
• Supercharged or turbocharged Oldsmobile engine builds
• Drag racing and competition engine applications
• Classic muscle car restoration and performance upgrades