Anyone know enough about the 2006 S40 front suspension to tell me what would be involved with changing the "Sport" suspension components back to the standard components for a nicer ride? I find the ride of my "new" S40 just too punishing at times, and I don't play boy-racer with my cars any more.

Looking here: 2006 Volvo S40 Parts - TascaParts.com,

It seems pretty clear that part #11 - Stabilizer Bar and #13 - Bushings are available in "Sport", "Dynamic" and "Comfort" versions. What about #4 - Coil Spring, there are 5 different springs available, marked 11 thru 15. Are there any other differences?

What if I ignore the springs (much harder to replace, yes?) and replace just the stabilizer bar and bushings? Or will that create a mess with the mismatched components?