{"product_id":"performance-engineering-manufacturing-new-center-section-fs-lw-583-ratio-31-spline","title":"Performance Engineering \u0026 Manufacturing 5.83 Ratio 31 Spline Center Section — Ford 9 in","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Performance Engineering \u0026amp; Manufacturing\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003ePerformance Engineering \u0026amp; Manufacturing engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Performance Engineering \u0026amp; Manufacturing lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin:24px 0 8px;\"\u003eWatch in action\u003c\/h3\u003e\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;margin:0 0 18px;border-radius:6px;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/TWJxTSVp45M\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003eHigh-Performance Differential Center Section\u003c\/h2\u003e\u003cp\u003eEngineered for maximum durability and precision, the Performance Engineering \u0026amp; Manufacturing Center Section is the ultimate upgrade for your Ford 9-inch rear end. Designed specifically for high-torque applications, this assembled unit features a 5.83 gear ratio and a robust 31-spline steel spool, ensuring consistent power delivery to the wheels.\u003c\/p\u003e\u003ch3\u003eKey Technical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRatio:\u003c\/strong\u003e 5.83 for optimized acceleration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Count:\u003c\/strong\u003e 31-spline compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Lightweight steel spool for reduced rotating mass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Standard Ford 9-inch housings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Fully assembled and ready for installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhether you are building a dedicated drag car or a high-performance street machine, this differential case provides the structural integrity required to handle extreme stress. The lightweight design helps improve vehicle response, while the precision-machined components minimize friction and wear during intense racing conditions. Each unit is built to exacting standards to ensure perfect gear mesh and long-term reliability. Trust the engineering expertise behind this component to keep your drivetrain performing at its peak. Upgrade your rear-end setup today with this premium solution from GGCRACING.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Performance Engineering \u0026amp; Manufacturing products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/standard-quick-change-gears\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerformance Engineering 18Q Quick Change Gear Set — 10 Spline Steel\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/performance-engineering-manufacturing400-gm-slip-yoke-1310-5-50in-32-spline\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerformance Engineering \u0026amp; Manufacturing TH400 Slip Yoke 1310 32 Spline 5.50in — Drivetrain\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/performance-engineering-manufacturingstandard-quick-change-gears\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerformance Engineering \u0026amp; Manufacturing Standard Quick Change Gears 61001 10 Spline — Stee\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/performance-engineering-manufacturingstandard-quick-change-gears-set-1q\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerformance Engineering \u0026amp; Manufacturing 1Q Quick Change Gear Set — 10 Spline Steel Gears\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/performance-engineering-manufacturingstandard-quick-change-gears-1\" style=\"color:#0066cc;text-decoration:none;\"\u003ePerformance Engineering \u0026amp; Manufacturing 61002 Standard Quick Change Gears Set 2 10 Spline\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Performance Engineering \u0026 Manufacturing 5.83 Ratio 31 Spline Center Section \\u2014 Ford 9 in\",\"description\":\"Upgrade your drivetrain with the Performance Engineering 5.83 Ratio 31 Spline Center Section. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Performance Engineering \u0026 Manufacturing?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Performance Engineering \u0026 Manufacturing 5.83 Ratio 31 Spline Center Section \\u2014 Fo?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. 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