They will fit the shocks, but I believe they are 2.1's. I have the 2.3's on my 03 and they are way, I mean WAY, better then stock. They 05's will work fine. Its not so much the stiffer spring over all it's the variable rate that killed the 03's. The initial roll of the light weight part of the spring got way too much body roll started and as heavy as the RX1 is, when it starts over, there's no turning it back. Lean all you want, its going where it wants to. If you can get the 05's cheap, go for it. 2.3's new are $90 for both. Good investment for the change in handling. Go with a stiffer bar and longer links as well and you'll be good to go. One last note, when you change the springs, don't put any preload on them. Bring the adjuster nut down to where it just touches and clamp down the jam nut. No preload needed on the stiffer springs.
