I am using the OEM RSX front mount. I haven't noticed any downsides in vehicle dynamics yet, but I haven't taken it on-track yet. Just some spirited driving. It is clear that the stiff pass-side mount transmits more vibration to the body than the driver's side due to the distance from the center of the engine (the source of vibration, second-order couple) and due to the very large difference in mount stiffness on the pass-side. I am guessing that the driver's side Innovative mount is a bit more compliant (relatively) than the pass-side one. When the MAP new-style of rear mount is available, I will try it with the OEM rubber.So Dave, do you have the 75A durometer poly mounts in the front and rear as well or are you using an OEM RSX front mount with the MAP bracket? Did you notice any change in responsiveness or “load shift” from the power train as a result of using the OE rubber passenger side mount?