I just swapped a Gen 4 dogbone mount into my 94 5SFE after reading about it here. It helped the rough idle a little bit, not as much as I thought it would. But there is a huge difference in driving now. The car accelerates so much smoother now. I had slight vibrations at a couple of speeds while accelerating. Now its a smooth ride up to 70 mph. The original mount was shot. So it needed to be replaced anyway. Spending the extra money on the gen4 mount and bracket was worth it, IMO.