Eagle B13057L03068 SBC 383 Balanced Rotating Assembly Kit - .030 Overbore

The Eagle B13057L03068 is a balanced rotating assembly designed for Small Block Chevy 383 cubic inch stroker builds with a .030 inch overbore (4.030 inch bore). This Street Performance rotating assembly includes a cast steel crankshaft with 3.750-inch stroke, Eagle SIR I-beam connecting rods, hypereutectic pistons, piston rings, and performance bearings.

Key Features:

• Cast steel crankshaft with 3.750-inch stroke for 383 cubic inch displacement
• Eagle SIR (Super I-beam Rods) forged 5140 steel I-beam connecting rods
• Hypereutectic aluminum pistons with Hastings rings
• Factory balanced by Eagle - ready to install with no additional balancing required
• Includes quality bearings for complete rotating assembly
• Designed for .030 inch overbore (4.030 inch final bore diameter)
• Ideal for naturally aspirated street engines producing up to 500 horsepower

Eagle Street Performance rotating assemblies offer an excellent balance of strength, performance, reliability, and affordability, making them a popular choice for Small Block Chevy stroker engine builds. The "B" prefix in the part number indicates this is a pre-balanced assembly, eliminating the need for additional balancing work at the machine shop.