[Base to WRX Suspension Conversion]

Any detailed info on the difference in spring rate between base, WRX, and STI?

[Base to WRX Suspension Conversion]

Hi guys 

 

My 2010 Impreza 2.5 has worn struts/tops and control arm/rear suspension bushings. I plan on keeping the car for a few more years and would like to upgrade some components to OEM WRX or STI parts. I'm not interested in making it a track car or lowering it alot. I just want to replace the worn base model parts with something better that will make the car feel more sporty. It's a daily driver so it needs to maintain decent ride quality. Here are my ideas/questions:

 

• Replace front lower control arms / rear links. It seems this is easier than pressing them out and not too expensive. Not really interesting in upgrading to urethane.  
• Replace factory shocks and springs with OEM equivalent  WRX or STI components. What are the differences in spring rates? Do they just swap in?
• Once the worn components are replaced I would like to upgrade the sway bars too.

[HI!]

I have a 2010 Impreza 2.5. I've had it for a few years and now that the suspension is starting to wear out i would like to look into upgrading it. What do I have to do to be able to post in the suspension forum?