Last year I bought a complete set of STi v 5 struts/springs. I was going to put them on my L coupe, but ended up trading for a WRX wagon. Now I'm wondering whether these would be a good fit for the wagon. Since it's heavier, are these an actual upgrade, or is the stock suspension fine. Also, at the same time, I bought a 20mm sway bar. Will this fit the new WRX wagon? Any thoughts would be appreciated.