Eagle 129324070 LS Competition Rotating Assembly - 8-Cylinder

The Eagle 129324070 Competition Rotating Assembly is engineered for high-performance LS engine builds requiring exceptional strength and reliability. This complete rotating assembly is designed for demanding applications producing up to 750 horsepower.

Kit Includes:

• Forged 4340 steel crankshaft with non-twist forging and multi-stage heat treatment
• Eagle H-Beam connecting rods with 6.125" center-to-center length
• Premium forged aluminum pistons (Mahle or Arias)
• Piston rings, pins, and locks
• High-performance rod and main bearings (Clevite or King)
• ARP 7/16" capscrew bolts for superior clamping force

Key Features:

• 4.000" stroke crankshaft precision-ground and micro-polished to less than 5 RA
• 4.070" bore size for LS2, LQ4, LQ9 engine platforms
• Internally balanced configuration
• Available with 24-tooth or 58-tooth reluctor wheel
• Cross-drilled and chamfered oil holes for improved lubrication
• Weight-matched components within +/- 1 gram for smooth operation

This assembly features Eagle's renowned forged 4340 crankshaft that undergoes stress-relieving, shot-peening, X-ray inspection, magnaflux testing, and sonic testing to ensure top-tier quality. The crankshaft journals feature .125" radius for increased strength and durability.

Note: Part numbers beginning with "B" are factory-balanced by Eagle. All other assemblies require professional balancing before installation. Verify bore size, reluctor ring tooth count, and cylinder head volume before ordering to ensure proper fitment.