UMI stepped spacer kit for 2005–2010 Ford Mustang fixes the oversized chassis hole in the rear upper control arm mount by reducing the 16mm chassis opening to the correct 14mm diameter. The spacers slide into the upper mount to eliminate slop and clunking during acceleration and braking. Designed for OEM upper mounts and compatible aftermarket mounts that use a 16mm hole; does not fit 2011 and later Mustangs.
UMI Performance 05-10 Ford Mustang Upper Control Arm Mount Stepped Spacers