The only performance gains you can get come from using stiffer rubber like Polyurethane or like drag cars use solid metal motor mounts. All this done is like said before keep the engine from twisting inside the bay and that power forcing it's way into your tranny. Problem with solid motor mounts which need to be used with solid tranny mounts is it will shake your car like crazy. So if your looking for Performance try somewhere else cause this is a last resort