Manley 290960 SBC Stroker Rotating Assembly Stroke Bore - 383 3.750 4.060

The Manley 290960 is a complete Small Block Chevy (SBC) 383 cubic inch stroker rotating assembly built for serious performance engine builders. Featuring a 3.750" stroke paired with a 4.060" bore, this kit delivers everything needed to transform a standard SBC block into a high-displacement 383 stroker powerplant.

Manley rotating assemblies are engineered around premium forged components throughout. The assembly is built on a lightweight 4340 forged steel crankshaft with a 3.750" stroke, complemented by 4340 forged steel H-beam connecting rods secured with 7/16" ARP 8740 cap screws. Pistons are Manley's 2618 forged aluminum Platinum Series units sized at 4.060" bore, paired with premium chrome moly wrist pins and Total Seal piston rings. Clevite "H" Series narrowed rod bearings and "P" or "H" Series main bearings round out the package.

Key Features:

• Lightweight 4340 forged steel crankshaft — 3.750" stroke
• 4340 forged steel H-beam connecting rods with 7/16" ARP 8740 cap screws
• Optional upgrade to ARP 2000 cap screws for maximum power applications
• 2618 forged aluminum Platinum Series pistons — 4.060" bore (+0.060" over)
• Premium chrome moly wrist pins
• Total Seal piston rings included
• Clevite "H" Series narrowed rod bearings
• Clevite "P" or "H" Series main engine bearings
• Rated to 750 hp with ARP 8740 cap screws; up to 1,500 hp with optional ARP 2000 upgrade

The Manley 290960 rotating assembly provides a solid foundation for high-performance SBC 383 builds ranging from street/strip applications all the way to dedicated race engines, delivering proven Manley quality at every level of the power range.