Home / Shop / Eagle Rotating Assembly Kit for Chevrolet LS-Series 3.898in Bore Intended for Internal Balance

Eagle Rotating Assembly Kit for Chevrolet LS-Series 3.898in Bore Intended for Internal Balance

SKU: EAG129023898

Engine Rotating Kits

EAG Rotating Assy - 8 Cyl

Eagle

Eagle Rotating Assembly Kit for Chevrolet LS-Series 3.898in Bore Intended for Internal Balance

SKU: EAG129023898

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.

We accept

Description

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

Product Overview

3.622" FORGED 4340 CRANK, 24 TOOTH RELUCTOR,6.125" H-BEAM RODS,7/16" ARP 8740 BOLTS,FORGED 4032 MAHLE -4CC FLAT TOP 3.898" PISTONS,PLASMA-MOLY FILE-FIT RINGS,KING XP ROD/MAIN BEARINGS.

Product Details

Assembly Type:	Competition Assembly
Bore:	3.898
Description:	Eagle Rotating Assembly Kit for Chevrolet LS-Series 3.898in Bore Intended for Internal Balance
Part Number:	eag129023898
Piston Brand:	Mahle
Piston Type:	Flat Top Forged
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 Prod. Rotating Assembly

Application Summary

CHEVY LS1

Part Type

Engine Crankshaft Rotating Assembly

Data: v4.2 - Upd: 2026-09-28 14:38:43

Specifications

Product Attributes - Brand: Eagle Specialty Products
Product Attributes - Manufacturer's Part Number: 129023898
Product Attributes - Part Type: Engine Rotating Kits
Product Attributes - Product Line: Eagle Competition Rotating Assemblies
Product Attributes - UPC: 00793348009186
Product Attributes - Actual Engine Displacement: 5.7L/346
Product Attributes - Rear Main Seal Style: 1-piece
Product Attributes - Bore (in.): 3.898 in
Product Attributes - Bore (mm): 99.009mm
Product Attributes - Engine Stroke (in.): 3.622 in.
Product Attributes - Balanced: No
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): +4.00cc
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.): Stock
Product Attributes - Piston and Ring Oversize (mm): Stock
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.): 6.125 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: For applications with 24x reluctor.

Reference Information

Brand Name/s	Eagle
StreetFX SKU	eag129023898
SFX Item ID	4053124
Supplier Item Code	4053124
Manufacturer SKU	129023898
Manufacturer UPC	793348009186
Alternative References	ESP-129023898, 3.898in