Eagle 11326L060 Chevy 454 Big Block Competition Rotating Assembly 4.000in Stroke 6.135in H-Beam 43cc Dome Pistons

The Eagle 11326L060 is a competition-grade rotating assembly engineered for Chevrolet Big Block 454 engines. Built around a forged 4340 steel crankshaft with a 4.000" stroke and paired with 6.135" forged H-Beam connecting rods, this kit delivers the strength and precision demanded by high-performance and race engine builds. Pistons are forged with a 43cc dome profile and sized for a 4.310" bore (.060" overbore), enabling elevated compression ratios suited for aggressive applications.

Kit Includes:

• Forged 4340 steel crankshaft — 4.000" stroke, 2-piece rear seal design
• Eagle H-Beam connecting rods — 6.135" length, forged from 4340 steel
• Forged dome pistons — 43cc dome, 4.310" bore (.060" over standard)
• File-fit piston rings
• High-performance rod and main bearings (King or Clevite)

Key Features:

• Competition-grade assembly — suitable for boosted, nitrous, and exotic fuel applications
• H-Beam rods use 2-piece forging to align metal grain with stress direction for maximum strength
• Crankshaft finished on Q-PAC micropolishing equipment with ESP Armor surface treatment for superior oil retention and corrosion resistance
• Precision bored using the Sunnen Kross grinding system for consistent, accurate tolerances
• Unbalanced assembly — professional machine shop balancing required prior to installation (see balanced version for a pre-balanced option)
• Test-fitted in-house at Eagle to ensure all components work together

The 11326L060 is part of Eagle Specialty Products' core competition rotating assembly lineup, designed to take the guesswork out of sourcing matched bottom-end components. Note: Eagle Specialty Products reserves the right to substitute pistons based on availability.