Manley 290940RX SBC 383 Rotating Assembly 3.750 Stroke 4.040 Bore +11cc Dome

The Manley 290940RX is a complete rotating assembly engineered for Small Block Chevy 383 stroker builds. Featuring a 3.750" stroke and 4.040" bore with a +11cc dome piston configuration and 6.000" rod length, this kit provides everything needed to build a high-output SBC 383 short block foundation.

Key Features:

• Lightweight 4340 forged steel crankshaft — non-twist design for maximum strength and reduced rotating mass
• 4340 forged steel H-Beam connecting rods with 7/16" ARP 8740 cap screws (optional ARP 2000 cap screws available for higher power levels)
• 2618 forged aluminum Platinum Series pistons with premium chrome moly wrist pins — +11cc dome configuration
• Total Seal high-performance piston ring set — ductile iron plasma moly top rings, reverse-twist cast iron second rings, and three-piece oil rings
• Clevite "H" Series narrowed rod bearings and "P" Series main bearings included
• Supports up to 750 hp with ARP 8740 cap screws; up to 1,500 hp with optional ARP 2000 cap screws
• Rod length: 6.000"
• Bore size: 4.040"
• Stroke: 3.750"

Important Note: This rotating assembly is supplied unbalanced. Professional balancing is required prior to installation.

Manley Performance has been producing precision internal engine components since 1966, and this SBC 383 rotating assembly reflects their commitment to quality, tight tolerances, and performance-grade materials suitable for street, strip, and racing applications.