Specifications
- Brand
- Eagle
- Part #
- 638133820
- UPC
- 793348060262

Eagle Chevy 4.8/5.3 LS 3.900in Crank 24 Tth Rlctor 6.125in I-Beam 3.820in Pistons Rotating Assembly
$2614.04
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Eagle Pro Street rotating assembly for Chevy 4.8L/5.3L LS engines. Features a 3.900in crank, 6.125in I-beam rods, and 3.820in pistons for naturally-aspirated racing.
Key Features
- Fits Chevy 4.8L and 5.3L LS engines.
- Includes a 3.900-inch stroke crankshaft.
- Features 6.125-inch I-beam connecting rods.
- Comes with 3.820-inch pistons.
- Designed for naturally-aspirated racing applications.
- 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
This Eagle Pro Street rotating assembly starts with a 3.900-inch stroke crankshaft, specifically designed for Chevy 4.8L and 5.3L LS engines. This is a critical component for building a naturally-aspirated racing engine, as the stroke length directly influences displacement and torque potential. The assembly includes 6.125-inch I-beam connecting rods, a popular choice for their strength and weight balance in performance applications, paired with 3.820-inch pistons. This combination is engineered to handle the demands of racing where consistent power delivery and durability are paramount.
Eagle has built a reputation for providing well-built engine components, and this rotating assembly is no exception. The I-beam connecting rods offer a solid balance of strength and reduced reciprocating weight compared to heavier H-beam designs, which can help improve engine responsiveness. The crankshaft is forged to withstand the stresses of higher RPM operation typical in racing. This assembly is intended for naturally-aspirated builds, meaning it's optimized for engines that don't use forced induction like turbochargers or superchargers. This focus allows for a more refined setup tailored for peak horsepower and torque within a specific operating range.
When undertaking a performance engine build of this caliber, it's important to ensure all supporting components are up to the task. This rotating assembly is a foundational piece, and its proper installation is key to achieving the desired performance and longevity. Remember that this assembly is not CARB approved and cannot be shipped to California. Always consult with a qualified engine builder to confirm compatibility with your specific build goals and ensure all necessary supporting modifications are addressed.
Specifications
- Brand
- Eagle
- Manufacturer Part #
- 638133820
- UPC
- 793348060262
Frequently Asked Questions
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