Eagle 12057030 Street Performance Rotating Assembly CID Small Block Chevy - 383

The Eagle 12057030 is a complete rotating assembly designed for Small Block Chevrolet 383 cubic inch stroker applications. This balanced assembly provides an excellent foundation for street performance engines producing reliable power under 500 horsepower.

Complete Kit Includes:

• Cast steel crankshaft with 3.750-inch stroke for increased displacement
• Forged steel I-beam connecting rods with ARP fasteners
• Hypereutectic aluminum pistons designed for 4.030-inch bore
• Premium piston rings with file-fit design
• Rod and main bearings
• Harmonic balancer and flexplate (externally balanced applications)

Key Features:

• Factory-balanced assembly for immediate installation
• Transforms 350 cubic inch engines to 383 cubic inches
• Optimized for pump gas and naturally aspirated street applications
• Compatible with Small Block Chevy 2-piece rear main seal blocks
• Quality Eagle components engineered for durability and performance

This rotating assembly is ideal for street rods, muscle car restorations, and performance builds where reliability and value are priorities. The 383 stroker configuration delivers improved low-end torque and stronger mid-range power compared to standard 350 engines.