I explain it this way to people.
- When you are cruising and accelerating in any gear above 2000 rpm, you don't fee a difference from the stock mount.
- When you are sitting still at idle with the A/C off, you don't fee a difference from the stock mount.
- When you are sitting still at idle with the A/C on, there is more vibration but nothing severe. It's noticeable but minor (the hood does not shake

).
- When you first take off in 1st gear, you WILL notice the extra vibration and noise until the RPMs pass thru 900 rpm thru 1500-1800 rpm.
- If you are in any gear and you try to accelerate in this RPM range (900-1800) you will feel extra noise and vibration (this is ok though, because you should downshift gears to bring RPMs up anyway).