Great product. I did not notice any additional vibrations...but I do already have a full poly suspension and poly tranny mount. Engine movement is greatly reduced when driving aggresively. Engine "bucking" when on/off throttle is very reduced and engine movement between shifts is SIGNIFICANTLY decreased. This mount and the other poly components hide a lot of the faults with stage 3 power on a fwd car.
Rating: [5 of 5 Stars!]