Manley 290140RHX SBC 383 Stroker Rotating Assembly Kit 3.750 Stroke 4.040 Bore

The Manley 290140RHX is a complete Small Block Chevy 383 cubic inch stroker rotating assembly kit designed for high-performance street and race applications. Built around a 3.750-inch stroke crankshaft matched to a 4.040-inch bore, this kit delivers the displacement increase and bottom-end torque that SBC builders demand without sacrificing reliability.

Manley Performance is a trusted name in precision-engineered rotating assemblies, and this kit reflects their commitment to tight tolerances and race-proven materials. The RHX designation indicates the inclusion of Manley's Race Series H-beam connecting rods, which offer superior strength and fatigue resistance over stock I-beam designs — ideal for boosted, nitrous, or high-RPM naturally aspirated builds.

Key Features:

• 383 cubic inch displacement — maximizes torque output from the classic Small Block Chevy platform
• 3.750-inch forged steel crankshaft — precision balanced for smooth high-RPM operation
• 4.040-inch bore pistons — forged aluminum construction for strength and thermal stability
• Race Series H-beam connecting rods — stronger than OEM I-beam rods, designed for high-horsepower applications
• Complete rotating assembly — crank, rods, and pistons matched and ready for assembly
• Engineered for street/strip and performance builds requiring proven bottom-end strength
• Manufactured by Manley Performance — an industry leader in performance engine components

Whether you're building a dedicated track car or a high-output street machine, the Manley 290140RHX stroker kit provides a strong, balanced foundation for your 383 SBC build. Compatible with standard Small Block Chevy engine blocks bored to 4.040 inches.