I plan to change out the rear subframe bushings in my 90ZTT when I have my shocks and springs replaced with an Eibach Pro Kit and stock cockpit-adjustable shocks. My priorities (in order of most important to less) are: 1. to prevent increase in cabin noise 2. to maintain ride quality (compliance) as much as possible 3. to stiffen the chassis 3. to reduce wheel hopSo I suppose derlin or aluminum subfame bushings would be out of question because they would transmit too much road noise and too much vibration to the cabin. And somebody warned me that the Energy Suspension urethane ones might squeek. So what about the Nismo rubber bushings? Are the significantly harder than stock and is ride quality and interior noise going to suffer with the Nismos? I'm leaning right now towards just getting new stock bushings. Also, are there ny other bushings that need to be replaced? (I've done the front tension rods already). Thanks for any input. Dan
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