Manley 290940R SBC Stroker Rotating Assembly Stroke Bore Dome - 383 3.750 4.040 10cc

The Manley 290940R is a complete rotating assembly kit engineered for Small Block Chevy (SBC) 383 stroker builds. Featuring a 3.750-inch stroke and designed for a 4.040-inch bore with 10cc dome pistons, this kit is purpose-built to deliver high compression and maximum power output for serious performance and racing applications. The 1-piece rear main seal (R-suffix) configuration is suited for later-model SBC blocks.

Key Features:

• Lightweight 4340 forged steel crankshaft — 3.750-inch stroke for true 383 cubic inch displacement
• 4340 forged steel H-beam connecting rods with 7/16-inch ARP 8740 cap screws (rated to 750 hp); upgradeable to optional ARP 2000 cap screws for up to 1,500 hp
• 2618 Platinum Series forged aluminum pistons — 10cc dome top, 4.040-inch bore, designed for elevated compression ratios
• Premium Chrome Moly wrist pins for strength and durability under high-load conditions
• Total Seal piston rings — 1/16-inch, 1/16-inch, 3/16-inch configuration for superior sealing
• Clevite H-Series narrowed rod bearings and P- or H-Series main bearings for high-performance reliability
• Internally precision balanced by Manley in-house for smooth, high-RPM operation
• Compatible with 1-piece rear main seal SBC block applications

Manley Performance has been manufacturing high-quality internal engine components since 1966, and this rotating assembly reflects that decades-long commitment to precision engineering. Whether you're building a high-compression street/strip engine or a dedicated race motor, the 290940R delivers the strength, balance, and reliability needed to make serious power with your SBC 383 stroker.