{"product_id":"performance-engineering-manufacturing-new-center-section-fs-lw-650-ratio-31-spline","title":"Performance Engineering \u0026 Manufacturing 6.50 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\/ZR_ug9SecjU\" 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\u003eLightweight Differential Center Section\u003c\/h2\u003e\u003cp\u003eThe Performance Engineering \u0026amp; Manufacturing 6.50 Ratio 31-Spline Center Section is engineered for racers who demand the absolute best in drivetrain efficiency. Featuring a specialized lightweight design, this unit is built to reduce parasitic power loss, allowing more of your engine's power to reach the pavement. It is the ideal choice for Ford 9-inch rear ends where every ounce counts.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRatio:\u003c\/strong\u003e 6.50 for specialized racing applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpline Count:\u003c\/strong\u003e 31-spline for high-strength engagement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Lightweight steel spool construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Natural finish, precision-machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits standard Ford 9-inch rear-end housings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis assembled differential case is more than just a gear set; it is a performance-enhancing component designed to withstand the rigors of competitive motorsports. By utilizing a lightweight steel spool, this center section minimizes rotating mass, which translates to faster acceleration and improved vehicle agility. Each component is manufactured with tight tolerances to ensure smooth operation and maximum durability under high-load conditions. Whether you are competing in drag racing or other high-performance events, this center section provides the reliability and performance edge you need to stay ahead of the competition. Elevate your drivetrain performance today with this premium part 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 6.50 Ratio 31 Spline Center Section \\u2014 Ford 9 in\",\"description\":\"Get precision performance with the Performance Engineering 6.50 Ratio 31 Spline Center Section for Ford 9 inch. Perfect for racing. 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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 6.50 Ratio 31 Spline Center Section \\u2014 Fo?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. See manufacturer documentation for torque specs and procedures.\"}}]}\u003c\/script\u003e","brand":"Performance Engineering \u0026 Manufacturing","offers":[{"title":"Default Title","offer_id":41448017690708,"sku":"GSDD_CSFS65031LW","price":766.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/PEMCSFS65031LW.jpg?v=1721586823","url":"https:\/\/ggcracing.com\/products\/performance-engineering-manufacturing-new-center-section-fs-lw-650-ratio-31-spline","provider":"GGCRACING INC","version":"1.0","type":"link"}