Home / Shop / Eagle Chevrolet Small Block 5.7L V8 Balanced Rotating Assembly Kit 4.030in Bore 3.750in Stroke

Eagle Chevrolet Small Block 5.7L V8 Balanced Rotating Assembly Kit 4.030in Bore 3.750in Stroke

SKU: EAGB12010030

Engine Rotating Kits

EAG Rotating Assy - 8 Cyl...

Eagle

Eagle Chevrolet Small Block 5.7L V8 Balanced Rotating Assembly Kit 4.030in Bore 3.750in Stroke

SKU: EAGB12010030

Engine Rotating Kits

EAG Rotating Assy - 8 Cyl...

Last Available from MFR. LAST ONE AVAILABLE from the manufacturer's distribution centre. Once sold, this item may not be immediately available again. The dispatch timeframe shown is an estimate based on historical orders for this part and is dependent on the manufacturer releasing the final available unit.

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Description

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

Product Overview

Eagle Competition Rotating Assemblies are the perfect choice for your racing engine. Eagle takes great care to select the best parts to makimize performance, reliability, and durability without breaking the bank. Eagle competition assemblies are recommended for use in racing engines including exotic fuels, nitrous, and forced-induction.

Product Details

Assembly Type:	Balanced Competition Assembly
Bore:	4.03
Description:	Eagle Chevrolet Small Block 5.7L V8 Balanced Rotating Assembly Kit 4.030in Bore 3.750in Stroke
Part Number:	eagB12010030
Piston Type:	Inverted Dome Forged 4032
Product Line:	Competition
Prop 65 (C, R or CR):	C
Prop 65 - Long Label:	This product contains nickel, which is known to the State of California to cause cancer
Prop 65 - Short Label:	prop65_warning.jpg
Prop 65 Yes/No:	Yes
Title:	Eagle Specialty Products - Balanced Competition Rotating Assembly
assembly balanced:	yes
balance type:	internal
connecting rod bolt diameter:	7/16"
connecting rod bolt material:	ARP 8740
connecting rod design:	H-Beam
connecting rod length:	6.000"
connecting rod material:	forged 4340 steel
crankshaft center counterweights:	no
crankshaft flange bolt holes:	6
crankshaft main journal diameter:	2.449"
crankshaft material:	forged 4340 steel
crankshaft reluctor:	no
crankshaft rod journal diameter:	2.100"
crankshaft stroke:	3.750"
cylinder bore diameter:	4.030"
damper included:	no
flexplate/flywheel included:	no
main bearing type:	hardened, narrowed or chamfered
main bearings included:	yes
oil rail support included:	no
piston brand:	Mahle
piston dome volume:	-16cc
piston face type:	inverted dome
piston material:	forged 4032 aluminum
piston pin diameter:	.927"
piston pin type:	full floating
piston ring gap:	file-fit
piston ring thickness:	1.0mm, 1.0mm, 2.0mm
rod bearing type:	hardened, narrowed or chamfered
rod bearings included:	yes
second piston ring type:	reverse twist iron
thrust washer included:	no
top piston ring type:	barrel faced plasma-moly

Application Summary

CHEVY 350

Part Type

Engine Crankshaft Rotating Assembly

Data: v4.2 - Upd: 2026-10-13 18:08:59

Specifications

Product Attributes - Brand: Eagle Specialty Products
Product Attributes - Manufacturer's Part Number: B12010030
Product Attributes - Part Type: Engine Rotating Kits
Product Attributes - Product Line: Eagle Competition Rotating Assemblies
Product Attributes - UPC: 793348803876
Product Attributes - Actual Engine Displacement: 6.3L/383
Product Attributes - Rear Main Seal Style: 2-piece
Product Attributes - Bore (in.): 4.030 in.
Product Attributes - Bore (mm): 102.362mm
Product Attributes - Engine Stroke (in.): 3.750 in.
Product Attributes - Balanced: Yes
Product Attributes - Piston Material: Forged aluminum
Product Attributes - Piston Style: Dish, with a D-shaped cup
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): +16.00cc
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.): 0.030 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.): 6.000 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 and inverted dome design pistons. Suitable up to 750 horsepower, 1500 horsepower with rod bolt upgrade.

Reference Information

Brand Name/s	Eagle
StreetFX SKU	eagB12010030
SFX Item ID	4052675
Supplier Item Code	4052675
Manufacturer SKU	B12010030
Manufacturer UPC	793348803876
Alternative References	ESP-B12010030, 5.7L, 4.030in, 3.750in