Fluidampr Steel Internally Balanced Damper 2003-2006 Nissan 350Z VQ35DE / 2003-2006 G35 VQ35DEWith every ignition of the air fuel mixture in a cylinder, the resulting combustion creates a powerful torque spike that is transmitted to the crankshaft through the piston and rod. This torque spike is strong enough to not only rotate the crankshaft, but also deform it and cause it to rebound. This deformation is referred to as torsional vibration. When these forces align with the natural frequency, they can cause harmful torsional harmonic