Eagle 35670040 Competition Rotating Assembly Chevy CID - 454 489

The Eagle 35670040 is a high-performance competition rotating assembly designed for Chevrolet Big Block 454 engines, producing 489 cubic inches of displacement. This complete assembly is engineered for demanding racing applications and high-horsepower builds exceeding 500 HP.

Complete Kit Includes:

• Forged 4340 steel crankshaft with 4.250" stroke and center counterweighting
• H-beam connecting rods with 6.385" length and ARP fasteners
• Forged aluminum pistons with +43cc dome configuration at 4.280" bore
• File-fit plasma-moly piston rings
• High-performance Clevite or King rod and main bearings

Key Specifications:

• Displacement: 489 cubic inches at 4.280" bore
• Compression ratio: 14.3:1 with 112cc chambers, 13.0:1 with 118cc chambers, 12.2:1 with 124cc chambers
• Designed for internal balance configuration
• All kits are designed for 2-piece rear main seal applications

Important Notes: This part number does not begin with "B" and is therefore an unbalanced assembly that must be professionally balanced by a qualified machine shop before installation. The forged 4340 crankshaft features non-twist forging, multi-stage heat treatment, and is stress-relieved and shot-peened for maximum durability. Each crankshaft is X-rayed, magnafluxed, and sonic-tested to ensure quality.

Ideal for racers and performance enthusiasts building high-compression, high-horsepower Chevy Big Block engines for competition use.