Eagle 21202055 Competition Rotating Assembly Mopar 440 RB 511ci

The Eagle 21202055 is a Big Block Mopar Competition Rotating Assembly that delivers ultimate reliability and strength at an affordable price for demanding applications. This complete kit includes an Eagle Forged 4340 Steel Crankshaft, Eagle H-Beam Rods, Mahle Forged Pistons, Hastings Rings, and high-performance Clevite or King Bearings.

Engine Specifications:

• Stroke: 4.250 inches
• Displacement at 4.375" bore: 511 cubic inches
• Connecting Rod Length: 7.100 inches
• Pistons: -8cc Flat Top design
• Piston Rings: File Fit
• Compression Ratios - 72cc: 12.3:1 / 80cc: 11.4:1 / 84cc: 11.0:1

Premium Components:

• Forged 4340 steel crankshaft with non-twist forging, 100% X-ray, magnafluxed and sonic tested, stress relieved and shot peened with .125" radius on rod and main journals
• Forged H-beam connecting rods with ARP 8740 bolts rated for high-performance applications
• Mahle forged aluminum pistons engineered for competition use
• Premium Hastings piston rings with file-fit design
• High-performance Clevite or King bearings for maximum durability

Important Installation Notes:

• Part numbers that do not begin with "B" are unbalanced assemblies and must be balanced by a qualified machine shop before use
• All kits are designed for internal balance
• Mopar 440 "RB" engines have a standard bore size of 4.320" - kits are available in .030" and .055" oversizes
• Chamfered bearings are required to clear the journal radius

This rotating assembly is designed for serious performance builds and competition applications where reliability and strength are paramount. Ideal for high-horsepower Mopar big block engine builds in classic muscle cars, racing applications, and performance street engines.