Manley 290030 SBC Stroker Rotating Assembly Stroke Bore - 383 3.750 4.030

The Manley 290030 is a complete high-performance rotating assembly engineered for small block Chevy 383 stroker builds with a 3.750-inch stroke and 4.030-inch bore. This comprehensive kit provides everything needed to build a bulletproof bottom end capable of handling serious horsepower and torque.

Complete Assembly Includes:

• Lightweight 4340 forged steel crankshaft with 3.750-inch stroke
• 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws
• 2618 forged aluminum Platinum Series pistons designed for 4.030-inch bore
• Premium chromoly wrist pins
• Total Seal piston rings
• Clevite H-Series narrowed rod bearings and P or H-Series main bearings

Performance Specifications:

• Horsepower rating: 750 hp with standard ARP 8740 cap screws
• Optional upgrade to ARP 2000 cap screws for up to 1,500 hp capability
• Heat treated, stress relieved, shot peened, and 100% magnafluxed crankshaft
• Micro-polished large radius journals for reduced friction

Manley rotating assemblies are precision-engineered as complete matched systems, delivering maximum strength, balance, and reliability for performance enthusiasts building high-output small block Chevy engines. Each component is designed to work together seamlessly for optimal durability under extreme RPM and cylinder pressure conditions.