You guys that lowered your cars, did you use the stock isolators, get the polyurethane isolators, or just leave them off for a lower drop? Whatever you did please let me know and how it came out. Post some pics if you can. That would be great.
I used my isolators when I installed my Roush springs. I took the rear isolators out with my stock springs though. Seriously, use electrical tape on the top of the coil if you do.
i got both poly's in the back (stock lowers were torn to shreds) and only the stock uppers in front the H&R Sports sit almost dead even and this way it brings back a slight rake, almost unnoticeable, but better than it did before
I replace my isolators with poly. The isolators they took off were in decent shape and could have been reused.
If you have a 99-04 car...they should still be in good shape. I would reuse them. I bought polys for my 91 notch when I replaced the LCA's because the stockers were rotted. I didn't notice any difference in the ride quality. I didn't take measurements either, but Im sure it sat up 1/8"-1/4" higher.