Originally Posted by NRBRNG
OK. Here goes; these are the pics I took prior to mounting. Great if you can work things out from here and share back.
Here are the various codes from the pics:
The springs are:
10-60-80 - this is a helper spring, it's fully collapsed when loaded (ignore it)
90-170 - this is a 60mm ID, 170mm free length, 90 Newtons per mm spring, or in English, it's a 6.7" 514 pound per inch racing spring
140-200 - this is a 60mm ID, 200mm free length, 140 Newtons per mm spring, or in English, it's a 7.9" 800 pound per inch racing spring
There should also have been a helper spring for the rear - marked 20-60-80. Was it there and you just didn't photograph it, or did they change the design so it's not needed any more?
These are the "normal" KW Clubsport springs lengths and rates for the E92 M3 kit.