Steering KnuckleI work with a guy who is an ex-mechanic and the steering knuckle is the part of the car which holds the upper and lower control arms as well as the ball joints, in conjunction which connects to the wheel hub. This part is very durable and Cymats part will definately reduce the noise inside the vehicle, since it will surpress the wheel bearings and any vibration. Nowis that a good thing?? I know by the vibration that i have a bad wheel bearing. Overall i think that this part is an awesome place to start since it is a part that would take a lot of strain and prove the process.