These adjustable coil-over shocks have proven their strength and longevity for years on end and they keep going. These shocks offer the best ride quality and handling. They increase suspension travel and dramatically increase the capabilities of your 4Runner’s front suspension. These coil-over’s are meant to be installed with an aftermarket uniball upper control arm kit to ensure the proper amount of wheel travel and to prevent premature ball joint wear. Recommended tire size 285/75R16, wheel 16X8 with 4.5″ back spacing.