Beside these new suspension components, engineers also re-tuned the suspension of the Mazda 6 facelift to deliver an even higher quality ride without compromising Mazda 6's acclaimed handling. They gave the front strut and perimeter-frame bush mounts a lower spring constant, inclined the cavity in the rear trailing-arm bushes forward, retuned the front and back dampers for less harshness from vertical input, and revised the rear axle's bump stoppers and damper bushes. These revisions reduce vertical vibration of the cabin in the 4 and 9 Hz frequency range and horizontal vibration in the 10 to 14 Hz frequency range, resulting in a smoother, more comfortable ride.