Manley 290130RX SBC Stroker Rotating Assembly Stroke Bore Flat Piston - 383 3.750 4.030 4cc

The Manley 290130RX is a complete 383 cubic inch Small Block Chevy (SBC) stroker rotating assembly built for high-performance and racing applications. Featuring a 3.750" stroke paired with a 4.030" bore, this externally balanced rotating assembly kit delivers the displacement and durability needed for serious power builds. Each kit is precision internally balanced by Manley in-house for smooth, reliable operation.

Kit Contents & Key Specifications:

• Crankshaft: Lightweight 4340 non-twist forged steel, 3.750" stroke, 350 main journals — heat treated, stress relieved, shot peened, nitrided, and 100% Magna Fluxed
• Connecting Rods: 4340 forged steel H-Beam, 6.000" center-to-center length, with 7/16" ARP 2000 cap screws (rated to 1,500 HP) — heat treated, stress relieved, shot peened, nitrided, and 100% Magna Fluxed
• Pistons: Manley 2618 forged aluminum Platinum Series, 4.030" diameter, 1.125" compression height, -4cc dish profile with Premium Chrome Moly wrist pins
• Piston Rings: Total Seal 1/16" – 1/16" – 3/16" ring set
• Bearings: Clevite high-performance "H" series rod (narrowed) and main bearings
• Balance: Externally balanced configuration
• Horsepower Rating: Rated to 1,500 HP with included ARP 2000 cap screws

Every component in this Manley stroker kit undergoes rigorous metallurgical processing to ensure maximum strength and longevity under extreme load. The 2618 forged aluminum pistons offer superior heat tolerance compared to 4032 alloy, making this assembly ideal for forced induction and nitrous applications. This kit is engineered to drop into a standard SBC 350 block bored to 4.030" with a 2-piece rear main seal configuration.