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 forged steel yoke, computer pickup assembly with two magnets, 40-spline aluminum spool, 7075 aluminum 4-link brackets, floater spindles, end bells, carbon fiber brakes, and 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") and / or 4-link center dimension (18", 19", or 21"): Inner 4 link brackets, outer 4 link brackets, spacers, and end bells. To order, please collect your dimensions (4-link center, wheel-to-wheel, and bolt pattern), then call 1-866-508-6394 or contact us to place your order.