Eagle B13101L04053 Street Performance Rotating Assembly - Chevy 305 355 CID

The Eagle B13101L04053 Street Performance Rotating Assembly is a complete, factory-balanced engine kit designed for small block Chevy 305 engines producing up to 500 horsepower. This assembly builds a 355 cubic inch displacement with a 3.480-inch stroke and 3.776-inch bore (.053 overbore).

Complete Assembly Includes:

• Eagle cast steel crankshaft with 3.480-inch stroke and .092-inch fillet radiuses for improved strength
• Eagle SIR (Super I-Beam Rod) forged 5140 steel I-beam connecting rods with 5.700-inch center-to-center length
• 3/8-inch ARP 8740 capscrew bolts for superior rod strength and reliability
• KB hypereutectic aluminum pistons with -5cc flat top design
• Hastings plasma-moly piston rings with standard gap
• King SI series rod and main bearings for excellent wear resistance

Factory Balanced: The "B" prefix indicates this assembly is precision-balanced by Eagle at the factory and requires no additional balancing before installation. This saves time and expense during engine assembly while ensuring smooth, vibration-free operation.

Eagle Street Performance rotating assemblies deliver exceptional value and reliability for street and mild performance applications. The cast steel crankshaft provides excellent durability, while the forged I-beam rods offer strength far exceeding stock components. The hypereutectic pistons feature improved silicon content for enhanced wear resistance and thermal stability.

This assembly is internally balanced and does not include a flexplate or harmonic dampener. Designed for 1-piece rear main seal applications on small block Chevy engines.