The only rubber in my car is in the weather stripping, trans support, and tires. I finally got around to installing delrin bushings in the rear along with delrin diff support and aluminum front diff bushings. The uppers are Bruce's and the lowers I think are the older style Max Motorsports, I'm not sure, I bought them off here about 5 years ago! The install isn't that bad, just time consuming, you have to take the whole rear end apart. I HIGHLY recommend doing the subframe, control arms, and diff at the same time. I did not. I did the subframe years ago and previously did the diff with poly. The rest of my suspension mods are coil overs, flsc, rear shock tower brace, tubular front a arms with poly bushings, front bump steer, al steering rack bushings, x2 ball joints, poly sway bar bushings, solid rear end links, poly front end links with billet supports, cc plates, and I think that is it.