Eagle Specialty Prod B42104031 Engine Crankshaft Rotating Assembly Balanced Street & Strip Olds 455

The Eagle Specialty Products B42104031 is a balanced Street & Strip rotating assembly built for Oldsmobile 455 engines. Designed for pump-gas, naturally aspirated street builds, this complete assembly pairs a 4.250-inch cast crankshaft with 6.735-inch H-beam connecting rods fastened by 7/16-inch ARP 8740 bolts. The kit includes Icon 4032 forged inverted dome pistons at a 4.155-inch bore with -14.4cc dome volume, plasma-moly file-fit rings, and King SI rod and main bearings — everything needed to assemble a balanced short-block.

Key Features:

• Balanced Street & Strip assembly ready for pump-gas, naturally aspirated applications
• 4.250-inch cast crankshaft
• 6.735-inch H-beam connecting rods with 7/16-inch ARP 8740 rod bolts
• Icon 4032 forged inverted dome pistons, 4.155-inch bore, -14.4cc dome
• Plasma-moly file-fit piston rings
• King SI rod and main bearings included
• Assembly is pre-balanced from the factory

Eagle's Street & Strip rotating assemblies are engineered for enthusiasts who want a reliable, performance-oriented foundation for street-driven Oldsmobile 455 builds. This California Prop 65 listed product ships at approximately 112 lbs.