Manley 290860X SBC Stroker Kit Stroke Bore Small Block Chevy Engine Crankshaft Rotating Assembly - 355 3.480 4.060

The Manley 290860X is a complete stroker rotating assembly kit engineered for Small Block Chevrolet (SBC) 355 cubic inch applications. Designed around a 3.480-inch stroke crankshaft and matched for a 4.060-inch overbore, this kit delivers everything needed to build a high-performance or high-output SBC short block with confidence.

Manley Performance has been a trusted name in high-performance engine components for decades, manufacturing connecting rods, crankshafts, pistons, and complete rotating assembly kits to exacting tolerances. The 290860X kit is purpose-built to maximize displacement and power potential from the legendary Chevy small block architecture.

Key Features:

• Designed for Small Block Chevrolet (SBC) engines
• 3.480-inch stroke crankshaft for increased displacement and torque
• Matched for 4.060-inch bore diameter
• 355 cubic inch displacement configuration
• Manley precision-manufactured components for tight tolerances and reliable performance
• Ideal for street performance, strip, and high-output engine builds

Manley's rotating assembly kits are designed to work together as a balanced system, reducing build time and ensuring component compatibility. The 290860X is a strong foundation for any SBC performance engine build requiring a proven, quality stroker combination.