SKU: PEMCSFS58331LW
MPN: CSFS58331LW
The New Center Section FS LW 583 Ratio 31 Spline is a precision differential assembly engineered for high-performance vehicles demanding superior gear ratio tuning and lightweight construction. This center section represents a core upgrade for serious enthusiasts and performance mechanics who require exact gear ratios to dial in acceleration characteristics, top-end capabilities, and drivetrain responsiveness.
Built by PEM with the FS LW (Full-Spool Lightweight) designation, this center section features a gear ratio of 5.83:1 and a 31-spline design optimized for direct power transfer with minimal rotational mass. The lightweight alloy steel construction reduces unsprung weight, improving suspension response and fuel economy while maintaining structural integrity under sustained load.
The 31-spline interface ensures secure engagement with compatible axle shafts, distributing torque evenly across all contact points and eliminating slip under aggressive acceleration or towing scenarios. This configuration strikes the ideal balance between strength and performance for modern drivetrain applications, making it best suited for experienced mechanics or shops equipped with press tools and dial indicators.
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