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Eagle Eagle Big Block Mopar Competition Rotating Assemblies

Eagle 21202055
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Eagle Eagle Big Block Mopar Competition Rotating Assemblies $2,039.99
Competition Rotating Assembly -
Mopar 440
Stroke: 4.250
Disp. @ 4.375: 511
Rod Length: 7.100
Pistons: -8cc Flat Top
Rings: File Fit
Comp. Ratio 72cc/80cc/84cc: 12.3/11.4/11.0

Eagle 21202055 Details

440 Block 8 Bolt Flange Competition Assemblies

Designed for Internal Balance - Flexplate/Flywheel and Balancer Not Included, Professional Machine Shop Balancing Required


Manufacturer's Part Number:

Eagle Big Block Mopar Competition Rotating Assemblies offer the ultimate reliability and strength at an affordable price for the most demanding applications. These kits include an Eagle Forged 4340 Steel Crankshaft, Eagle H-Beam Rods, Mahle Forged Pistons, Hastings Rings and high-performance Clevite or King Bearings.


  • Assembly part numbers that begin with “B” are balanced by Eagle and require no additional balancing.  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 400 "B" engines have a standard bore size of 4.340". Kits are available in .030" oversize only (4.375").
  • Mopar 440 "RB" engines have a standard bore size of 4.320". Kits are available in .030", and .055" oversizes.
  • Eagle Specialty Products reserves the right to substitute pistons due to availability.

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Some parts are not legal for use in California or other states with similar laws / regulations