Eagle 137603898 LS Engine Rotating Assembly - 3.898" Bore 4.000" Stroke

The Eagle 137603898 is a high-performance rotating assembly designed for LS-series engines. This complete rotating assembly includes all the essential components needed for a reliable engine build, engineered for enthusiasts seeking improved strength and durability over stock components.

Key Components:

• Forged 4140 steel crankshaft with 4.000" stroke and 58-tooth reluctor
• 6.125" forged 4340 I-beam connecting rods with 7/16" ARP 8740 bolts
• Forged 4032 aluminum DSS pistons with -5cc flat top design
• 3.898" bore size (LS1/LS6 standard bore)
• Piston rings, bearings, and all necessary hardware included

Features and Benefits:

• Forged 4340 steel I-beam rods provide exceptional strength for high-performance applications
• ARP 8740 rod bolts ensure superior clamping force and reliability
• Forged 4032 aluminum pistons offer improved heat resistance and durability
• Compatible with LS1 and LS6 engines with 3.898" bore
• Test-fitted in house by Eagle to ensure proper clearances and fit
• Suitable for naturally aspirated or forced induction builds

This rotating assembly is ideal for street performance, racing, and high horsepower builds where reliability and strength are critical. The forged components provide a significant upgrade over cast OEM parts, making this kit perfect for engine builders seeking quality and performance at a competitive price point.