Manley 290330 Small Block Chevy 434ci Rotating Assembly Kit 4.000 Stroke 4.155 Bore

The Manley 290330 is a complete rotating assembly kit designed for Small Block Chevy engines, producing 434 cubic inches (7.1L) with a 4.155-inch bore and 4.000-inch stroke configuration. This assembly is designed for applications with 350 cubic inch main journals and features a 2-piece rear main seal style.

Premium Components for High-Performance Builds:

• 4340 forged steel crankshaft with lightweight design for internal balance applications
• 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws rated for 750 horsepower, or optional ARP 2000 cap screws for up to 1,500 horsepower
• 2618 Platinum Series forged aluminum pistons with premium chromoly wrist pins
• Total Seal piston rings for superior sealing performance
• Clevite "H" Series narrowed rod bearings and "P" or "H" Series main engine bearings

The crankshaft undergoes an extensive heat treating and stress relieving process, is shot peened, nitrided, and 100% magnafluxed to ensure complete structural integrity for durability and longevity. Manley rotating assemblies are designed for performance enthusiasts wanting to get the most out of their engines, making this kit an ideal foundation for high-horsepower street or racing small block Chevy builds.

Note: This rotating assembly is unbalanced and will require professional balancing before installation.