Manley 290740RHX SBC 355 Rotating Assembly Kit 3.480" Stroke 4.040" Bore

The Manley 290740RHX is a complete rotating assembly kit engineered for Chevrolet Small Block (SBC) 355 cubic inch performance builds. Featuring a 3.480-inch stroke and designed for a 4.040-inch bore, this balanced assembly provides a solid foundation for high-horsepower street and race engine builds.

Key Features:

• 4340 Forged Steel Crankshaft — Lightweight forged construction for superior strength and durability under high-RPM stress
• Pro Series I-Beam Connecting Rods — Fitted with 7/16" ARP 2000 cap screws for high-horsepower capability
• 2618 Forged Aluminum Platinum Series Pistons — Premium alloy construction engineered for elevated thermal resistance and power output
• Premium Chromoly Wrist Pins — High-strength pins for precise piston-to-rod alignment
• Total Seal Piston Rings — Included for superior ring seal and reduced blow-by
• Clevite Bearings — Includes narrowed rod bearings and main engine bearings for proper clearances
• Pre-Balanced Assembly — Factory balanced to reduce vibration and extend engine life

The 290740RHX rotating assembly is ideal for performance enthusiasts building a high-output SBC 355 engine. All major rotating components are included and matched as a system, simplifying the engine assembly process and ensuring proper component compatibility from the ground up.