Home / Shop / Eagle Chrysler RB 4.150in Crank 6.760in H-Beam -8cc Flat Top 4.375in Pistons Balanced Assembly

Eagle Chrysler RB 4.150in Crank 6.760in H-Beam -8cc Flat Top 4.375in Pistons Balanced Assembly

SKU: EAGB21201055

Engine Rotating Kits

EAG Rotating Assy - 8 Cyl...

Eagle

Eagle Chrysler RB 4.150in Crank 6.760in H-Beam -8cc Flat Top 4.375in Pistons Balanced Assembly

SKU: EAGB21201055

Engine Rotating Kits

EAG Rotating Assy - 8 Cyl...

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

Eagle Competition Rotating Assemblies are perfect for all forms of racing use including nitrous and forced-induction.

Application Summary

Chrysler RB

Part Type

Engine Crankshaft Rotating Assembly

Data: v4.2 - Upd: 2026-10-13 17:09:22

Specifications

Product Attributes - Brand: Eagle Specialty Products
Product Attributes - Manufacturer's Part Number: B21201055
Product Attributes - Part Type: Engine Rotating Kits
Product Attributes - Product Line: Eagle Competition Rotating Assemblies
Product Attributes - UPC: 793348701257
Product Attributes - Actual Engine Displacement: 8.1L/499
Product Attributes - Rear Main Seal Style: 2-piece
Product Attributes - Bore (in.): 4.375 in.
Product Attributes - Bore (mm): 111.125mm
Product Attributes - Engine Stroke (in.): 4.150 in.
Product Attributes - Balanced: Yes
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Piston Style: Flat top, with two valve reliefs
Product Attributes - Harmonic Balancer Included: No
Product Attributes - Flexplate Included: No
Product Attributes - Flywheel Included: No
Product Attributes - Pistons Included: Yes
Product Attributes - Piston Head Volume (cc): +6.00cc
Product Attributes - Wrist Pin Style: Floating
Product Attributes - Piston Rings Included: Yes
Product Attributes - Piston Ring Facing Material: Plasmamoly
Product Attributes - Piston and Ring Oversize (in.): 0.055 in.
Product Attributes - Crankshaft Included: Yes
Product Attributes - Crankshaft Material: Forged 4340 steel
Product Attributes - Engine Balance: Internal
Product Attributes - Connecting Rods Included: Yes
Product Attributes - Connecting Rod Length Center to Center (in.): 6.760 in.
Product Attributes - Connecting Rod Material: Forged 4340 steel
Product Attributes - Connecting Rod Beam Style: H-beam
Product Attributes - Rod Bearings Included: Yes
Product Attributes - Rod Bearing Undersize (in.): Stock
Product Attributes - Rod Bearing Undersize (mm): Stock
Product Attributes - Main Bearings Included: Yes
Product Attributes - Main Bearing Undersize (in.): Stock
Product Attributes - Main Bearing Undersize (mm): Stock
Product Attributes - Cam Bearings Included: No
Product Attributes - Gaskets Included: No
Product Attributes - Oil Pump Included: No
Product Attributes - Camshaft Included: No
Product Attributes - Lifters Included: No
Product Attributes - Timing Chain and Gears Included: No
Product Attributes - Plastigage Included: No
Product Attributes - Assembly Lubricant Included: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - Notes: Assembly includes file fit piston rings. 6-bolt crankshaft flange. Suitable for use up to 850 horsepower, 1500 horsepower with rod bolt upgrade.

Reference Information

Brand Name/s	Eagle
StreetFX SKU	eagB21201055
SFX Item ID	4059013
Supplier Item Code	4059013
Manufacturer SKU	B21201055
Manufacturer UPC	793348701257
Alternative References	ESP-B21201055, 4.150in, 6.760in, -8cc, 4.375in