Just wondering what the difference might be? I found a good deal on some PSS9 but didn't find too much info on the difference. It would go on an 01.

 

From what I understant, the 10's have 10 adjustments, the 9's have 9. The 10's adjustments are 10 stiffest to 1 softest and the 9's are 9 softest to 1 stiffest.

 

I had PSS10's on my M3, and I recall being told that they were easier to operate then the PSS9's. Like, when you turn the settings/adjustment, it takes much less force. It was probably the single best mod I had on that car.

 

+1 - what a difference..

 

Better adjustment *****(and yes numbered opposite of PSS9s) and 1 more setting. Same total range of adjustment though and spring rates.