Manley 290330HX SBC 434 Rotating Assembly Kit 4.000 Stroke 4.155 Bore High Compression

The Manley 290330HX is a complete Small Block Chevy 434 CID rotating assembly kit built for high-compression, high-performance applications. This internally balanced stroker kit combines Manley's premium forged components into a precision-matched assembly, saving build time while ensuring all parts are optimally balanced together from the factory.

At its core, the kit features a Manley 4340 non-twist lightweight forged steel crankshaft with a 4.000" stroke and 350 main journals. The crank undergoes a rigorous finishing process including heat treatment, stress relief, shot peening, nitriding, and 100% Magna-Flux inspection for maximum strength and reliability.

The Manley 4340 forged steel H-beam connecting rods measure 6.000" in length and are secured with 7/16" ARP 2000 cap screws rated to 1,500 hp. Like the crankshaft, the rods are heat treated, stress relieved, shot peened, nitrided, and 100% Magna-Fluxed to ensure race-proven durability.

Forged 2618 aluminum Platinum Series pistons at 4.155" bore diameter complete the rotating assembly. The entire kit is precision internally balanced in-house by Manley, reducing the time and cost of external balancing.

Key Features:

• Engine Displacement: 434 CID (Small Block Chevy)
• Crankshaft Stroke: 4.000"
• Piston Bore Diameter: 4.155"
• Rod Length: 6.000" H-Beam
• Crankshaft Material: 4340 Non-Twist Lightweight Forged Steel, 350 Main Journals
• Connecting Rod Fasteners: 7/16" ARP 2000 Cap Screws (1,500 hp rated)
• Piston Material: 2618 Forged Aluminum Platinum Series
• High-Compression Design: +4cc Dome configuration for elevated compression ratio
• Balancing: Precision internally balanced by Manley in-house
• Treatment: All major components are heat treated, stress relieved, shot peened, nitrided, and 100% Magna-Fluxed
• Includes performance piston rings (Total Seal 1/16"-1/16"-3/16")

The Manley 290330HX is engineered for builders demanding a complete, race-quality SBC 434 stroker rotating assembly with no compromises in materials or manufacturing process.