I am in the process of figuring out my suspension on my DA. For shocks/springs I am going with koni yellows with gc coils (at which rate, I dont know yet). I was also inclined to change the bushings on some suspension parts but I am not certain and which parts and how they affect the car. I do know that rear LCA bushing will be replaced as well as shock bushings but thats where I am stuck. I am not certain on any of the other bushings and what they do, what material to use, etc. I have heard of polyurethane binding and such, but I have searched and havent really found much else along cons/pros with specific bushings. I also dont want to replace every single pushing as thats not only time consuming, but also useless as my car is in no form a race and the vibration throughout the cabin is not worth the extra compliance.

 

Replace them all with OEM rubber or Mugen, IMO.

Use Mugen for the Rear Trailing arm, but everything else is ok for oem rubber. You can use poly in the front upper control arm and all 4 lower shock mount bushings, but I wouldnt use it anywhere else - the suspension arms do not move in a single axis, and the poly can have a binding effect, and they will wear out quickly.