ok so my friend just got an 01 cobra yellow with black saleens. under wot it will start to sway back and forth, to the point were you think it is going to lose control. it goes it almost ever time this is in a straight line to not going around a corner. we think it could be a bad shock? we are both somewhat new to the irs well on mustangs. could the irs have bad bushings that could cause this i wouldent think but it could be. the car has a brand new motor all stock except exhaust. any help is much appreciated!