Manley 290930R SBC 383 Stroker Rotating Assembly 3.750 Stroke +10cc Dome Pistons

The Manley 290930R is a complete high-performance rotating assembly engineered for Small Block Chevy (SBC) 383 cubic inch stroker builds. Featuring a 3.750-inch stroke and +10cc dome pistons, this kit is designed to deliver elevated compression ratios ideal for naturally aspirated, high-output street and strip applications. The "R" designation indicates compatibility with 1-piece rear main seal engine blocks.

Every component in this assembly is manufactured and precision-balanced in-house by Manley Performance, a brand with decades of expertise in high-performance engine internals dating back to 1966. The result is a ready-to-install rotating assembly built to exacting tolerances for reliable power delivery.

Kit Components & Features:

• Crankshaft: Lightweight 4340 forged steel, 3.750-inch stroke
• Connecting Rods: 4340 forged steel H-Beam, 6.000-inch length, with 7/16-inch ARP 8740 cap screws (ARP 2000 optional)
• Pistons: 2618 forged aluminum Platinum Series with +10cc dome for high compression ratio builds
• Wrist Pins: Premium Chrome Moly included
• Piston Rings: Total Seal 1/16"–1/16"–3/16" ring set included
• Bearings: Clevite high-performance H-Series rod and main bearings included
• Balance: Internally precision-balanced by Manley in-house
• Rear Seal: 1-piece rear main seal compatible ("R" suffix)
• Horsepower Rated: Up to 750 HP with ARP 8740; up to 1,500 HP with optional ARP 2000 cap screws

Manley's Platinum Series 2618 forged pistons are engineered to handle extreme cylinder pressures and high-heat environments, making this assembly equally suited for performance street engines and dedicated race builds. All components are matched, balanced, and ready for installation, saving significant machine shop time and cost.