i just installed bilstein shocks and struts with bmr lowering springs and control arms, adjustable panhard rod bar, torque arm mount, and trans mount....the car is stiff as ****....its nice and stiff but not too harsh, the front is perfect, but the rear is annoying, feels u feel everything the rear tires hit. is this a good combination for road racing, and occasional draggin? also is this setup dependable for the life span of the parts? any input?