This is an excellent value brake upgrade for a 300zx, and not too difficult for an amateur mechanic with a basic toolkit to install. Very happy with the performance and aesthetics of these brakes. I did find the supplied hardware to be of very poor quality - most of it I didn't end up using. The hex socket head bolts were weak to the point that attempting to torque them to spec would round the socket. Several bolts were too short, with an uncomfortable amount of thread engagement.