SPC Performance Mustang Adj. Caster RodIf you are running modern radial tires you should not follow factory alignment specifications for caster, SPC recommends 3deg of caster to promote return to center steering. Stock strut rods on the 1st generation Mustangs are non adjustable and often haveworn bushings that can cause unwanted movement of the lower rod assembly and poor handling. A must for early Mustangs, SPC's adjustable caster rod features low durometer OE style bushings to protect