Specifications
- Brand
- Eagle
- Part #
- 129554065
- UPC
- 793348063157

Eagle Chevy LS3 4.125in Crank 58 Tth Reluctor 6.125in H-Beam 4.065in Pistons Rotating Assembly
$3087.60
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Eagle Chevy LS3 rotating assembly with 4.125" crank, 6.125" H-beam rods, and 4.065" pistons. Competition Assembly.
Key Features
- Fits Chevy LS3 engines.
- Features a 4.125 inch stroke forged steel crankshaft.
- Includes a 58 tooth reluctor wheel for engine management.
- Comes with 6.125 inch long H-beam connecting rods.
- Designed for pistons with a 4.065 inch bore.
- Not CARB approved; cannot ship to California.
⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more
Product Details
Starting with a 4.125 inch stroke forged steel crankshaft, this Eagle rotating assembly is built for serious performance applications in Chevy LS3 engines. The crankshaft features a 58 tooth reluctor wheel, essential for proper engine management system communication. Paired with this are 6.125 inch long H-beam connecting rods, known for their strength and ability to handle high RPMs and significant cylinder pressures. These rods are designed to work with 4.065 inch bore pistons, forming the core of a robust bottom end.
This assembly is a well-built package for builders looking to significantly upgrade their LS3 engine's internal components. The forged steel construction of the crankshaft offers improved durability over cast options, while the H-beam rods provide a strong link between the pistons and the crankshaft. This combination is crucial for engines that will see track use or aggressive street driving where reliability under stress is paramount. It's important to note that this assembly is not CARB approved and cannot be shipped to California due to emissions regulations.
When undertaking a build of this caliber, careful attention to balancing and assembly is critical. Ensure all components are clean and properly lubricated before installation. While this assembly provides the core rotating components, you will need to source pistons, rings, bearings, and potentially a harmonic balancer and flexplate or flywheel separately to complete the engine build. Always refer to the manufacturer's detailed assembly instructions for precise specifications and procedures.
Specifications
- Brand
- Eagle
- Manufacturer Part #
- 129554065
- UPC
- 793348063157
Frequently Asked Questions
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