Includes a 2-year warranty against ring and pinion failure!

This is a complete full floater assembly ready to run. Includes Mark Williams 12" pitch diameter ring and pinion with 40-spline pinion shaft ~ Custom gear ratios now available! ~, ball bearing pinion support, 40-spline pinion coupler, computer pickup assembly with two magnets, 40-spline aluminum spool, lightened steel brakes, floater spindles, series II floater end bells, and 40-spline MW floater axles. Based on 9" Ford modular dimensions (16" housing width), the 12" requires little or no modifications for cars currently running 9" modular components.

There are many items that can be interchanged to get your specific wheel to wheel width (from 33" to 36" and 38" to 42"): spacers, end bells, etc. To order, please collect your dimensions (wheel-to-wheel and bolt pattern), then call 1-866-508-6394 or contact us to place your order.