Manley 38555RHX BBC 555 Rotating Assembly Kit 4.250 Stroke 4.560 Bore -3cc Flat Top

The Manley 38555RHX is a complete rotating assembly kit engineered for Big Block Chevy (BBC) 555 cubic inch stroker builds. Featuring a 4.250-inch stroke and 4.560-inch bore, this kit delivers everything needed to build a bulletproof BBC bottom end for high-horsepower street, strip, or racing applications.

At the heart of this assembly is a lightweight 4340 forged steel crankshaft paired with 4340 forged steel H-Beam connecting rods secured with premium ARP 2000 cap screws — rated for up to 1,500 horsepower. The pistons are Manley's own 2618 forged aluminum Platinum Series in a -3cc flat-top design, fitted with premium chrome moly wrist pins for exceptional strength under high-boost and high-RPM conditions.

Kit Includes:

• Lightweight 4340 forged steel crankshaft — 4.250" stroke
• 4340 forged steel H-Beam connecting rods with ARP 2000 cap screws (rated to 1,500 HP)
• 2618 forged aluminum Platinum Series pistons — 4.560" bore, -3cc flat-top
• Premium chrome moly wrist pins
• Total Seal high-performance piston rings
• Clevite "H" Series narrowed rod bearings
• Clevite "P" Series main engine bearings

Key Specifications:

• Engine Family: Big Block Chevy (BBC)
• Displacement: 555 cubic inches
• Stroke: 4.250"
• Bore: 4.560"
• Piston Head Volume: -3cc (flat-top)
• Rod Bolt Upgrade: ARP 2000 Cap Screws
• Horsepower Rating: Up to 1,500 HP

Manley's BBC rotating assemblies are meticulously engineered for strength, durability, and optimal performance across street and racing applications. The 38555RHX is an ideal foundation for any serious BBC stroker build demanding maximum power potential.