Manley 290860HX Stroker Kit SBC 355 3.480 Stroke 4.060 Bore H-Tuff Series

The Manley 290860HX is a complete rotating assembly stroker kit designed for Small Block Chevrolet (SBC) engines, building a 355 cubic inch combination using a 3.480-inch stroke crankshaft and 4.060-inch bore forged pistons. This kit bundles Manley's premium forged internals into a matched set, simplifying the engine-building process while ensuring all critical rotating components are balanced and spec'd to work together.

Manley Performance is a trusted name in high-performance and racing engine components, known for producing forged crankshafts, H-beam and I-beam connecting rods, and forged pistons used across drag racing, road racing, and high-performance street applications. The H-Tuff series designation reflects Manley's use of stronger alloy steel and tighter manufacturing tolerances suited for forced-induction and high-horsepower builds.

Kit Highlights:

• Application: Small Block Chevrolet (SBC)
• Displacement: 355 cubic inches
• Stroke: 3.480 inches
• Bore: 4.060 inches
• Series: H-Tuff — designed for high-stress, high-horsepower environments
• Forged components for superior strength over cast alternatives
• Matched rotating assembly for improved balance and reduced machining time
• Suitable for naturally aspirated, turbocharged, supercharged, and nitrous applications

Choosing a complete stroker kit from a single manufacturer like Manley ensures component compatibility and simplifies sourcing for your engine build. Always verify bore size, deck height, and rod length requirements with your machine shop before final assembly.