Manley 290940X SBC Stroker Kit Stroke Bore Small Block Chevy Engine Crankshaft Rotating Assembly - 383 3.750 4.040

The Manley 290940X is a complete Small Block Chevy (SBC) 383 cubic inch stroker kit engineered for enthusiasts and builders looking to extract maximum displacement and power from the classic Chevy small block platform. Designed around a 3.750" stroke and a 4.040" bore, this kit delivers the popular 383 stroker combination in a matched component package built to Manley's exacting performance standards.

Key Features:

• 383 cubic inch displacement — achieved through the proven 3.750" stroke and 4.040" bore combination
• 3.750" forged steel crankshaft stroke — optimized for torque and high-RPM durability
• 4.040" bore specification — compatible with properly prepared SBC cylinder blocks
• Manufactured by Manley Performance, a trusted name in high-performance engine components
• Components are precision-matched for proper fitment and balance
• Designed for street performance, strip, and high-output engine builds

Manley Performance has been producing race-proven engine components for decades, and this SBC 383 stroker kit reflects that heritage. Whether you're building a high-torque street engine or an all-out performance powerplant, the Manley 290940X provides the foundation for a reliable, high-displacement small block Chevy build.