If you are serious about your Mustang’s performance and reliability, the direct-fit FAB9 fabricated 9-inch rear-end housing from Chassisworks provides the structural integrity, precision fit and adjustability required for any top contender. The FAB9 housing features strategically placed control arm mounts to improve performance, and works perfectly with OEM or aftermarket control arms in the factory mounting locations. Lower-control-arms mount at one of four axle bracket positions, permitting anti-squat adjustment and suspension geometry optimization for your particular vehicle. When used with coil-over shocks, included shock mounts provide three positions with a ride-height adjustment range of 1-3/4". An optionally available shock mount set increases the adjustment range to 3-1/16" and eight positions. Housings are constructed from mild steel or 4130 chrome-moly and available in stock or narrowed widths. Additional assembly options include urethane-bushing or spherical-bearing upper-control-arm mounts and drag-race-ready, anti-roll-bar and wheelie-bar mounting brackets. Direct-fit FAB9 housings are available for 1979 to 2004 Mustangs and other Ford/Mercury, Fox-chassis vehicles.