I just changed the passenger mount this past weekend and as soon as I started up the car, I couldn't believe how much better it felt. I can physically feel the car shifts less than before. I also seemed to have more vibration in my gas pedal than normal, and it seems even that improved.
Looks like I'll be replacing the mount every 70-80k. Now to get my front door speakers and tweeters changed and buy an amp for them.
Sent from my Pixel 2 XL using FF Mobile