Manley 290740RX Small Block Chevy Stroker Rotating Assembly Kit Stroke Bore - 355 3.480 4.040

The Manley 290740RX is a complete rotating assembly kit engineered for Small Block Chevy (SBC) engines targeting a 355 cubic inch displacement build. Designed around a 3.480-inch stroke and a 4.040-inch bore, this kit delivers everything needed to assemble a balanced, performance-ready bottom end for street, strip, or high-performance applications.

Manley Performance is a trusted leader in aftermarket engine components, and their rotating assembly kits are precision-matched to work together for optimal balance and durability. Components in this kit are manufactured to tight tolerances, ensuring reliable power output and longevity under demanding conditions.

Key Features:

• Designed for Small Block Chevy (SBC) engine platforms
• 355 cubic inch displacement configuration
• 3.480-inch stroke crankshaft specification
• 4.040-inch bore diameter specification
• Precision-matched rotating assembly components for optimal balance
• Engineered for street/strip and high-performance applications
• Manufactured by Manley Performance — a trusted name in race engine components

Ideal for performance engine builders looking to maximize power and reliability from the classic Small Block Chevy platform.