Eagle B13574L06068 Balanced Rotating Assembly Small Block Chevy - 383

The Eagle B13574L06068 Balanced Rotating Assembly is a complete, factory-balanced engine kit designed for small block Chevy 383 cubic inch builds at .060" overbore. This Street and Strip assembly delivers reliable performance for street engines producing up to 500 horsepower, combining quality components with affordability.

Complete Assembly Includes:

• Eagle cast steel crankshaft with 3.750" stroke
• Eagle SIR (Super I-beam Rod) forged 5140 steel I-beam connecting rods with 5.700" center-to-center length
• 3/8" ARP 8740 capscrew rod bolts
• Hypereutectic aluminum pistons with flat top design
• Hastings piston rings
• High-performance street bearings (rod and main)
• 168-tooth flexplate for 1-piece seal applications

Key Features:

• Factory Balanced: Balanced by Eagle - ready to install with no additional balancing required
• Internally Balanced Design: Eliminates the need for heavy metal in the crankshaft
• Quality Materials: Eagle uses only certified steel with smoother surface finishes for improved oil flow and reduced wear
• Complete Kit: Everything needed for bottom end assembly in one package
• Application-Specific: Designed for .060" overbore with 68cc compression chamber heads

Specifications:

• Engine: Small Block Chevy
• Displacement: 383 cubic inches
• Bore Size: 4.060" (.060" oversize)
• Stroke: 3.750"
• Rod Length: 5.700" center-to-center
• Rod Type: Forged 5140 steel I-beam (SIR)
• Rod Bolts: 3/8" ARP 8740
• Crankshaft: Cast steel
• Pistons: Hypereutectic aluminum, flat top
• Balance: Internal, factory-balanced by Eagle
• Seal Type: 1-piece rear main seal
• Power Rating: Suitable for engines up to 500 horsepower

This balanced rotating assembly is ideal for street performance and weekend strip applications where reliability and value are paramount. The Eagle SIR connecting rods provide excellent strength for the price point, while the hypereutectic pistons offer good thermal stability and wear resistance for street use.

Note: This assembly is designed for 1-piece rear main seal blocks. The included 168-tooth flexplate fits standard GM automatic transmission applications. Compression ratio will vary based on cylinder head chamber volume and deck height.